Battle of the Philippine Sea

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Battle of the Philippine Sea
Part of the Pacific War of World War II
Japanese aircraft carrier Zuikaku and two destroyers under attack.jpg
The carrier Zuikaku (center) and two destroyers under attack by U.S. Navy carrier aircraft, June 20, 1944
DateJune 19–20, 1944
Location
Result American victory [1]
Belligerents
Flag of the United States (1912-1959).svg  United States Merchant flag of Japan (1870).svg  Japan
Commanders and leaders
Flag of the United States (1912-1959).svg Raymond A. Spruance
Flag of the United States (1912-1959).svg Marc A. Mitscher
Naval ensign of the Empire of Japan.svg Jisaburō Ozawa
Naval ensign of the Empire of Japan.svg Kakuji Kakuta
Units involved
US Naval Jack 48 stars.svg U.S. 5th Fleet Naval ensign of the Empire of Japan.svg 1st Mobile Fleet
Strength
7 fleet carriers
8 light carriers
7 battleships
8 heavy cruisers
13 light cruisers
68 destroyers
28 submarines


~900 carrier aircraft
5 fleet carriers
4 light carriers
5 battleships
11 heavy cruisers
2 light cruisers
31 destroyers
24 submarines
6 oilers

~450 carrier aircraft
~300 land-based aircraft
Casualties and losses
1 battleship damaged
123 aircraft destroyed [2]
109 dead
3 fleet carriers sunk
2 oilers sunk
550–645 aircraft destroyed [2]
6 other ships damaged
2,987 dead (estimate)

The Battle of the Philippine Sea (June 19–20, 1944) was a major naval battle of World War II that eliminated the Imperial Japanese Navy's ability to conduct large-scale carrier actions. It took place during the United States' amphibious invasion of the Mariana Islands during the Pacific War. The battle was the last of five major "carrier-versus-carrier" engagements between American and Japanese naval forces, [3] [N 1] and pitted elements of the United States Navy's Fifth Fleet against ships and aircraft of the Imperial Japanese Navy's Mobile Fleet and nearby island garrisons. This was the largest carrier-to-carrier battle in history. [4]

World War II 1939–1945 global war

World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945. The vast majority of the world's countries—including all the great powers—eventually formed two opposing military alliances: the Allies and the Axis. A state of total war emerged, directly involving more than 100 million people from over 30 countries. The major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease, and the only use of nuclear weapons in war.

Imperial Japanese Navy Naval branch of the Empire of Japan

The Imperial Japanese Navy was the navy of the Empire of Japan from 1868 until 1945, when it was dissolved following Japan's surrender in World War II. The Japan Maritime Self-Defense Force (JMSDF) was formed after the dissolution of the IJN.

Mariana Islands archipelago in western North Pacific Ocean

The Mariana Islands are a crescent-shaped archipelago comprising the summits of fifteen mostly dormant volcanic mountains in the western North Pacific Ocean, between the 12th and 21st parallels north and along the 145th meridian east. They lie south-southeast of Japan, west-southwest of Hawaii, north of New Guinea and east of the Philippines, demarcating the Philippine Sea's eastern limit. They are found in the northern part of the western Oceanic sub-region of Micronesia, and are politically divided into two jurisdictions of the United States: the Commonwealth of the Northern Mariana Islands and, at the southern end of the chain, the territory of Guam. The islands were named after the influential Spanish queen Mariana of Austria.

Contents

The aerial part of the battle was nicknamed the Great Marianas Turkey Shoot by American aviators for the severely disproportional loss ratio inflicted upon Japanese aircraft by American pilots and anti-aircraft gunners. [5] During a debriefing after the first two air battles a pilot from USS Lexington remarked "Why, hell, it was just like an old-time turkey shoot down home!" [6] The outcome is generally attributed to American improvements in training, tactics, technology (including the top-secret anti-aircraft proximity fuze), and ship and aircraft design. [N 2] [N 3]

USS <i>Lexington</i> (CV-16) US Navy Essex-class aircraft carrier

USS Lexington (CV/CVA/CVS/CVT/AVT-16), nicknamed "The Blue Ghost", is an Essex-class aircraft carrier built during World War II for the United States Navy. Originally intended to be named Cabot, word arrived during construction that USS Lexington (CV-2) had been lost in the Battle of the Coral Sea. The new aircraft carrier was renamed while under construction to commemorate the earlier ship

Proximity fuze fuze that detonates an explosive device

A proximity fuze is a fuze that detonates an explosive device automatically when the distance to the target becomes smaller than a predetermined value. Proximity fuzes are designed for targets such as planes, missiles, ships at sea, and ground forces. They provide a more sophisticated trigger mechanism than the common contact fuze or timed fuze. It is estimated that it increases the lethality by 5 to 10 times, compared to these other fuzes.

During the course of the battle, American submarines torpedoed and sank two of the largest Japanese fleet carriers taking part in the battle. [7] :331–333 The American carriers launched a protracted strike, sinking one light carrier and damaging other ships, but most of these aircraft returning to their carriers ran low on fuel as night fell and 80 planes were lost. Although at the time, the battle appeared to be a missed opportunity to destroy the Japanese fleet, the Imperial Japanese Navy had lost the bulk of its carrier air strength and would never recover. [2]

Background

Admiral Isoroku Yamamoto was killed in Operation Vengeance on April 18, 1943. The following day, Admiral Mineichi Koga succeeded Yamamoto as Commander-in-Chief of the Combined Fleet. Koga wanted the Imperial Japanese Navy to engage the American fleet in a single decisive battle in early 1944.

Isoroku Yamamoto Japanese Marshal Admiral

Isoroku Yamamoto was a Japanese Marshal Admiral of the Navy and the commander-in-chief of the Combined Fleet during World War II until his death.

Operation Vengeance

Operation Vengeance was the American military operation to kill Admiral Isoroku Yamamoto of the Imperial Japanese Navy on April 18, 1943, during the Solomon Islands campaign in the Pacific Theater of World War II. Isoroku Yamamoto, commander of the Combined Fleet of the Imperial Japanese Navy, was killed on Bougainville Island when his transport bomber aircraft was shot down by United States Army Air Forces fighter aircraft operating from Kukum Field on Guadalcanal.

Mineichi Koga Japanese admiral

Mineichi Koga was a Japanese Marshal Admiral and commander-in-chief of the Imperial Japanese Navy's Combined Fleet.

From the very start of the conflict in December 1941, the Japanese war plan had been to discourage America by inflicting such severe and painful losses on its military that the public would become war weary and the American government would be convinced to sue for peace and allow Japan to keep her conquests in east and southeast Asia. [8] Though at a numerical disadvantage from the outset, and an industrial disadvantage that would add to that disparity over the course of time, the Japanese high command believed they could fight the U.S. Navy in a single, decisive engagement, known as the Kantai Kessen , which would allow them to defeat the Americans. However, their ability to fight and win such a battle was slipping away. Imperial Navy aircrew losses suffered over the course of the earlier carrier battles at Coral Sea and Midway, and the long Solomon Islands campaign of 1942-43, had greatly weakened the Japanese Navy's ability to project force with its carriers. [9]

Suing for peace is an act by a warring nation to initiate a peace process. Suing for peace is usually initiated by the losing party in an attempt to stave off an unconditional surrender and may sometimes be favorable to the winning nation, as prosecuting a war to a complete or unconditional surrender may be costly. In this case, then, the word "sue" is being used in its original, now-obsolete meaning of "to make petition to or for", rather than the usual meaning of "to take legal action against".

<i>Kantai Kessen</i>

The Decisive Battle Doctrine was a naval strategy adopted by the Imperial Japanese Navy prior to the Second World War. The theory was derived from the writings of American naval historian Alfred Thayer Mahan. In the Decisive Battle Doctrine the Japanese navy would win a war by fighting and winning a single, decisive naval action. The idea gained broad acceptance following the Russo-Japanese War, where a well-trained, smaller Japanese naval force gained a decisive victory in the Sea of Japan at the Battle of Tsushima, defeating their rival the Russian Empire, a western naval power. Operational plans thereafter were influenced by the effective naval gunnery Japan demonstrated at Tsushima.

Battle of the Coral Sea major naval battle in the Pacific Theater of World War II

The Battle of the Coral Sea, fought from 4 to 8 May 1942, was a major naval battle between the Imperial Japanese Navy (IJN) and naval and air forces from the United States and Australia, taking place in the Pacific Theatre of World War II. The battle is historically significant as the first action in which aircraft carriers engaged each other, as well as the first in which the opposing ships neither sighted nor fired directly upon one another.

As the Solomon Islands campaign was largely fought by the Imperial Navy, losses suffered there drastically reduced the number of skilled carrier pilots available to fill the carrier air groups. Losses suffered in the Solomons could be readily absorbed, replaced and made good by the U.S. Navy, but not by the Japanese. It took nearly a year for the Japanese to reconstitute their air groups following the Solomons campaign. [8]

The initial Japanese plan was to engage the U.S. Pacific Fleet in early 1944, whenever it launched its next offensive, but the decisive battle consequently had to be delayed. [10] Meanwhile, American material production capacity, aircrew training, and technological advances made a Japanese victory increasingly difficult to achieve. By the end of 1942, the Allied navies had overcome most of the technological edges Japan's ships and planes had held at the start of the war. Furthermore, by mid-1943 mass production of ships and improved aircraft began to tip the balance of forces in favor of the Allies. Allied training practices similarly adapted to new developments. The US revised fleet operations, with parallel developments in both the Combat Information Center and in doctrine, training, and practices to get the most out of the new communications and sensor technologies.[ citation needed ]

After puncturing Japan's 'outer' defensive ring at the costly Battle of Tarawa in late 1943, the U.S. Navy brought these improvements together in the form of the Fast Carrier Task Force, under Vice Admiral Marc Mitscher (known as Task Force 58 when part of Admiral Raymond Spruance's Fifth Fleet and Task Force 38 when part of Admiral William F. Halsey's Third Fleet). Led by this main strike force, in early 1944 the U.S. fleet continued its advance in a steady progression across the islands of the central Pacific. [11] After achieving their goals in the Gilbert Islands campaign, the Americans began a series of softening-up missions aimed at weakening Japanese land-based airpower to limit Japan's ability to interfere with future amphibious invasions. Few U.S. commanders realized how powerful Task Force 58 had become. Though initially undertaken with trepidation, the raids proved to be successful beyond anything U.S. planners had imagined—notably with Operation Hailstone, which effectively neutralized the primary central Pacific base of the Imperial Japanese Navy at Truk Lagoon and changed the manner in which the war would be pursued.[ citation needed ]

While U.S. commanders, particularly Admiral Spruance, were concerned about the Japanese trying to attack U.S. transports and newly landed forces, the Japanese objective was actually to engage and defeat the Fast Carrier Task Force. [12] The Japanese commanders saw the Marianas island group in the central Pacific, including Guam, Tinian, and Saipan, as their inner circle of defense. Land-based fighter and bomber aircraft on these islands controlled the sea lanes to Japan and protected the home islands. As the Americans prepared for the Marianas campaign, the IJN concluded that the Kantai Kessen could be delayed no longer.[ citation needed ]

The Japanese had a number of advantages they hoped would turn the battle in their favor. Though outnumbered in ships and aircraft, they planned to supplement their carrier airpower with land-based aircraft. [13] In addition, the Japanese aircraft had superior range, which could allow them to engage the American carriers while their own carriers remained beyond the range of American aircraft. Furthermore, with island bases in the area, the Japanese hoped to launch at distance, have their aircraft attack the U.S. fleet and then land on island airfields. They then could shuttle back and attack again on the return flight. Thus the U.S. fleet would be in the position of receiving punishment without being able to deliver it. Lastly, the area was dominated by the easterly trade winds. Naval aircraft of the era needed a head wind blowing across the flight deck to enable the aircraft to launch. The easterly trade winds that dominated the Central Pacific seas meant that aircraft carriers would necessarily have to be steaming eastward to launch and recover aircraft; consequently a fleet located to the west of the Marianas would be in position to initiate and break off the battle, placing the initiative in the hands of the Japanese. [13] [14]

In March 1944, Admiral Koga was killed when his aircraft flew into a typhoon and crashed. [13] A new Commander-in-Chief of the Combined Fleet, Admiral Soemu Toyoda, was appointed; he continued the work, finalizing the Japanese plans known as Plan A-Go or Operation A-Go. [15] The plan was adopted in early June 1944, then within weeks quickly put into place to engage the American fleet now detected heading for Saipan. [16]

Initial stages

F6F-3 landing aboard Lexington -- Task Force 58 flagship USS Lexington (CV-16) Philippine Sea.jpg
F6F-3 landing aboard Lexington — Task Force 58 flagship

On June 12, 1944, U.S. carriers made air strikes on the Marianas, convincing Admiral Toyoda that the U.S. was preparing to invade. This move came as a surprise; the Japanese had expected the next U.S. target to be farther to the south, either the Carolines or the Palaus, and had protected the Marianas with only 50 land-based aircraft. On June 13–15, American carriers made additional airstrikes while surface forces bombarded the Marianas. On June 15, the first American troops went ashore on Saipan.

Since control of the Marianas would bring American strategic bombers in range of the Japanese home islands, the IJN decided it was time for the long-awaited Kantai Kessen (decisive battle). Toyoda immediately ordered a fleet-based counterattack, committing nearly all of the Japanese navy's serviceable ships. [8]

The main portions of the fleet rendezvoused on June 16 in the western part of the Philippine Sea and completed refueling on June 17. Admiral Jisaburō Ozawa commanded this force from his newly commissioned flagship, Taihō. In addition to extensive command facilities, reinforced torpedo blisters, and a large air group, Taihō was the first Japanese carrier with an armor-plated flight deck, designed to withstand bomb hits with minimal damage.

At 18:35 on 15 June, submarine USS Flying Fish sighted a Japanese carrier and battleship force coming out of San Bernardino Strait. An hour later USS Seahorse spotted a battleship and cruiser force steaming up from the south, 200 miles east of Mindanao. The submarines were under orders to report sightings before attempting to attack, so Flying Fish waited until nightfall, then surfaced to radio in its report. [17] Fifth Fleet commander Spruance was convinced that a major battle was at hand. After consulting with Admiral Chester Nimitz at Pacific Fleet Headquarters in Hawaii, he ordered Task Force 58, which had sent two carrier task groups north to intercept aircraft reinforcements from Japan, to reform and move west of Saipan into the Philippine Sea. [18]

TF 52's old battleships, cruisers, and escort carrier groups were ordered to remain near Saipan to protect the invasion fleet and provide air support for the landings.

Shortly before midnight on June 18, Nimitz radioed Spruance that a Japanese vessel had broken radio silence. The message intercepted was an apparent dispatch from Ozawa to his land-based air forces on Guam. Radio direction-finding placed the sender approximately 355 miles (560 km) west-southwest of TF 58. [19] Mitscher considered whether the radio messages were a Japanese deception, as the Japanese were known to send a single vessel off to break radio silence, to mislead their adversaries about the actual location of the main force. [20]

Mitscher realized that there was a chance of a night surface encounter with Ozawa's forces. Arleigh Burke, Mitscher's Chief of Staff (a former destroyer squadron commander who had won several night battles in the Solomons), assumed that battle line commander Lee would welcome the opportunity. But Lee strongly opposed such an encounter. [18] Having personally experienced a confused night action off Guadalcanal, Lee was not enthusiastic about a night engagement with Japanese surface forces, believing that his crews were not adequately trained for it. Shortly after learning Lee's opinion, Mitscher requested permission from Spruance to move TF 58 west during the night, to reach a launch position at dawn that would allow for a maximum aerial assault on the enemy force.

Spruance considered for an hour, then refused Mitscher's request. [21] Mitscher's staff was disappointed with Spruance's decision. [22] On the situation, Captain Burke later commented: "We knew we were going to have hell slugged out of us in the morning. We knew we couldn't reach them. We knew they could reach us." [23] Spruance said "if we were doing something so important that we were attracting the enemy to us, we could afford to let him come—and take care of him when he arrived." This was in stark contrast to the Battle of Midway in 1942, where Spruance advocated immediately attacking before his own strike force was fully assembled, as neutralizing enemy carriers before they could launch their planes was the key to the survival of his carriers. [24]

Spruance's decision was influenced by his orders from Nimitz, who had made it clear that the protection of the invasion fleet was the primary mission of Task Force 58. Spruance had concerns that the Japanese would attempt to draw his main fleet away from the Marianas with a diversionary force while slipping an attack force in to destroy the landing fleet. [25] Locating and destroying the Japanese fleet was not his primary objective, and he was unwilling to allow the main strike force of the Pacific Fleet to be drawn westward, away from the amphibious forces. Mitscher accepted the decision without comment. [22] Spruance's decision in this matter, although subsequently criticized, was certainly justified; by this point in the war, it was well-known that Japanese operational plans frequently relied on the use of decoys and diversionary forces. However, in this particular engagement, and in sharp contrast to the subsequent Battle of Leyte Gulf, there was no such aspect in the Japanese plan.

Before daybreak, Spruance suggested that if the daybreak searches revealed no targets, the bombers could be sent to crater the airfields on Rota and Guam. However, the fleet's contact-fused bombs had been largely used up in the earlier strikes, and Mitscher was left with only the armor-piercing bombs needed to combat the Japanese fleet, so he informed Spruance he could not launch such strikes. [26] As the morning broke, TF 58 launched search aircraft, combat air patrols (CAP), and anti-submarine patrols, and then turned the fleet west to gain maneuvering room from the islands. [27] The U.S. Navy had developed a sophisticated air control system, which vectored CAP fighters by radar to intercept enemy bombers well before they reached the fleet. Any attackers that got through the CAP would then face a "gun line" of screening battleships and cruisers that would put up devastating barrages of VT-fuzed anti-aircraft fire before the attackers reached the aircraft carriers. [28] [N 2] [N 3]

Battle

Map of the Battle of the Philippine Sea Battle Philippine sea map-en.svg
Map of the Battle of the Philippine Sea

Early actions

The Japanese had already launched their morning search patrols, using some of the 50 aircraft stationed on Guam, and at 05:50 one of these, a Mitsubishi A6M Zero, found TF-58. After radioing his sighting of U.S. ships, the bomb-carrying Zero attacked picket destroyer Stockham and was shot down by destroyer Yarnall. [29]

Alerted, the Japanese began launching their Guam-based aircraft for an attack. These were spotted on radar by U.S. ships. A group of thirty Grumman F6F Hellcats were dispatched from USS Belleau Wood to deal with the threat. The Hellcats arrived while aircraft were still launching from Orote Field. Minutes later, additional radar contacts were seen, which were later discovered to be the additional forces being sent north from the other islands. A battle broke out in which 35 Japanese aircraft were shot down for the loss of a single Hellcat. It was a pattern that would be repeated throughout the day. At 09:57 large numbers of bogeys were picked up approaching the fleet. Mitscher said to Burke "Get those fighters back from Guam". The call "Hey, Rube!" was sent out. [27] [N 4] The fleet held steady until 10:23, when Mitscher ordered TF 58 to turn into the wind on course east-southeast, and ordered all fighter aircraft aloft, deployed in several layers of (CAP) to await the Japanese. [30] He then sent his bomber aircraft aloft to orbit open waters to the east rather than leaving them in a hangar deck full of aircraft vulnerable to a Japanese bomb attack. [31]

Japanese raids

Fighter aircraft contrails mark the sky over Task Force 58, June 19, 1944 Fighter plane contrails in the sky.jpg
Fighter aircraft contrails mark the sky over Task Force 58, June 19, 1944

The recall had been ordered after several ships in TF 58 picked up radar contacts 150 miles (240 km) to the west around 10:00. This was the first of the raids from the Japanese carrier forces, with 68 aircraft. TF 58 started launching every fighter it could; by the time they were in the air the Japanese had closed to 70 miles (110 km). However, the Japanese began circling to regroup their formations for the attack. This 10-minute delay proved critical, and the first group of Hellcats met the raid, still at 70 miles (110 km), at 10:36. They were quickly joined by additional groups. Within minutes, 25 Japanese aircraft had been shot down, against the loss of only one U.S. aircraft.

The Japanese aircraft that survived were met by other fighters, and 16 more were shot down. Of the 27 aircraft which now remained, some made attacks on the picket destroyers USS Yarnall and USS Stockham but caused no damage. Between three and six bombers broke through to Lee's battleship group and attacked; one bomb hit the main deck of USS South Dakota, killing or injuring over 50 men, but failed to disable her. South Dakota was the only American ship damaged in this attack. No aircraft of Ozawa's first wave got through to the American carriers.

USS Bunker Hill is nearly hit by a Japanese bomb during the air attacks of June 19, 1944. USS Bunker Hill (CV-17) is near-missed by a Japanese bomb during the Battle of the Philippine Sea, 19 June 1944 (80-G-366983).jpg
USS Bunker Hill is nearly hit by a Japanese bomb during the air attacks of June 19, 1944.

At 11:07, radar detected another, larger attack. This second wave consisted of 107 aircraft. They were met while still 60 miles (97 km) out, and at least 70 of these aircraft were shot down before reaching the ships. Six attacked Rear Admiral Montgomery's group, nearly hitting two of the carriers and causing casualties on each. Four of the six were shot down. A small group of torpedo aircraft attacked Enterprise, one torpedo exploding in the wake of the ship. Three other torpedo aircraft attacked the light carrier Princeton, but were shot down. In all, 97 of the 107 attacking aircraft were destroyed.

The third raid, consisting of 47 aircraft, came in from the north. It was intercepted by 40 fighters at 13:00, while 50 miles (80 km) out from the task force. Seven Japanese aircraft were shot down. A few broke through and made an ineffective attack on the Enterprise group. Many others did not press home their attacks. This raid therefore suffered less than the others, and 40 of its aircraft managed to return to their carriers.

The fourth Japanese raid was launched between 11:00 and 11:30, but pilots had been given an incorrect position for the U.S. fleet and could not locate it. They then broke into two loose groups and turned for Guam and Rota to refuel.

Lt. Alexander Vraciu downed six Japanese dive bombers in a single mission, June 19, 1944. Alexander Vraciu June 1944 80-G-236841.jpeg
Lt. Alexander Vraciu downed six Japanese dive bombers in a single mission, June 19, 1944.

One group flying toward Rota stumbled upon Montgomery's task group. Eighteen aircraft joined battle with American fighters and lost half their number. A smaller group of nine Japanese dive bombers of this force evaded U.S. aircraft and attacked Wasp and Bunker Hill, but scored no hits. Eight were shot down. The larger group of Japanese aircraft had flown to Guam and were intercepted over Orote Field by 27 Hellcats while landing. Thirty of the 49 Japanese aircraft were shot down, and the rest were damaged beyond repair. Aboard the Lexington afterward, a pilot was heard to remark "Hell, this is like an old-time turkey shoot!" [32]

Including the continued aerial slaughter over Orote Field, Japanese losses exceeded 350 planes on the first day of battle. About thirty American planes were lost, and there was little damage to American ships; even the damaged South Dakota was able to remain in formation to continue her anti-aircraft duties.

Most of the Japanese pilots who successfully evaded the U.S. fighter screens were the small number of seasoned veterans who had survived the six-month Japanese advance early in the Pacific War, the Battle of Midway, and the Guadalcanal Campaign.[ citation needed ]

Submarine attacks

Throughout the day, American scout aircraft had been unable to locate the Japanese fleet. However, two American submarines had already spotted Ozawa's carriers early that morning, and were about to provide important assistance to the Fast Carrier Task Force.

Japanese aircraft carrier Taiho Japanese aircraft carrier Taiho 02.jpg
Japanese aircraft carrier Taihō

At 08:16 the submarine USS Albacore, which had sighted Ozawa's own carrier group, had maneuvered into an ideal attack position; Lieutenant Commander James W. Blanchard selected the closest carrier as his target, which happened to be Taihō, the largest and newest carrier in the Japanese fleet and Vice Admiral Jisaburo Ozawa's flagship. As Albacore was about to fire, however, her fire-control computer failed, and the torpedoes had to be fired "by eye". Determined to go ahead with the attack, Blanchard ordered all six torpedoes to be fired in a single spread to increase the chances of a hit. [7] :331–333

USS Albacore Albacore-ii.jpg
USS Albacore

Taihō had just launched 42 aircraft as a part of the second raid when Albacore fired its torpedo spread. Of the six torpedoes fired, four veered off-target; Sakio Komatsu, the pilot of one of the recently launched aircraft, sighted one of the two which were heading for Taihō and dived into its path, detonating it. However, the sixth torpedo struck the carrier on her starboard side, rupturing two aviation fuel tanks. The carrier's escorting destroyers made depth charge attacks, but caused only minor damage to Albacore.

Initially, the damage to Taihō seemed minor; the flooding was quickly contained and the carrier's propulsion and navigation were unaffected. Taihō quickly resumed regular operations, but gasoline vapor from the ruptured fuel tanks began to fill the hangar decks, creating an increasingly dangerous situation on board.

Japanese aircraft carrier Shokaku Japanese aircraft carrier shokaku 1941.jpg
Japanese aircraft carrier Shōkaku
USS Cavalla Uss cavalla ss-244 1945 usnavy-pd.jpg
USS Cavalla

Another submarine, USS Cavalla, was able to maneuver to an attack position on the 25,675-ton carrier Shōkaku by about noon. The submarine fired a spread of six torpedoes, three of which struck Shōkaku on her starboard side. [7] :329–331 Badly damaged, the carrier came to a halt. One torpedo had hit the forward aviation fuel tanks near the main hangar, and aircraft that had just landed and were being refueled exploded into flames. Ammunition and exploding bombs added to the conflagration, as did burning fuel spewing from shattered fuel pipes. With her bows subsiding into the sea and fires out of control, the captain gave orders to abandon ship. Within minutes, there was a catastrophic explosion of aviation fuel vapor which had built up between decks, which blew the ship apart. The carrier rolled over and sank about 140 miles (230 km) north of the island of Yap. 887 crew and 376 men of the 601st Naval Air Group, 1,263 men in all, were killed. There were 570 survivors, including the carrier's commanding officer, Captain Hiroshi Matsubara. Destroyer Urakaze attacked the submarine, but Cavalla escaped with relatively minor damage despite near misses from depth charges. [7] :330

Meanwhile, Taihō was falling victim to poor damage control. Hoping to clear the explosive fumes, an inexperienced damage-control officer ordered her ventilation system to operate at full blast. This action instead spread the vapors throughout Taihō, putting the entire vessel at risk. At approximately 14:30, a spark from an electric generator on the hangar deck ignited the accumulated fumes, triggering a series of catastrophic explosions. After the first explosions, it was clear that Taihō was doomed, and Ozawa and his staff transferred to the nearby Zuikaku. [7] :332 Soon thereafter, Taihō suffered a second series of explosions and sank. From a crew of 2,150, 1,650 officers and men were lost.

U.S. counterattack

Japanese Carrier Division Three under attack by United States Navy aircraft from Task Force 58, late afternoon, June 20, 1944. The heavy cruiser circling at right, nearest to the camera, is either Maya or Chokai. Beyond that is the small aircraft carrier Chiyoda. Battle of the Philippine Sea.jpg
Japanese Carrier Division Three under attack by United States Navy aircraft from Task Force 58, late afternoon, June 20, 1944. The heavy cruiser circling at right, nearest to the camera, is either Maya or Chōkai. Beyond that is the small aircraft carrier Chiyoda.

TF 58 sailed west during the night to attack the Japanese at dawn. Search patrols were put up at first light.

Admiral Ozawa had transferred to the destroyer Wakatsuki after Taihō was hit, but the radio gear on board was incapable of sending the number of messages needed, so he transferred again, to the carrier Zuikaku, at 13:00. He then learned of the disastrous results of the previous day, and that he had about 150 aircraft left. Nevertheless, he decided to continue the attacks, thinking there were still hundreds of aircraft on Guam and Rota, and started planning new raids for June 21.

The main problem for TF 58 was locating the enemy, who had been operating at a great distance. Early-morning American searches on June 20 found nothing. An extra mid-day search by Hellcat fighter pilots was also unsuccessful. Finally at 15:12 a garbled message from an Enterprise search plane indicated a sighting. At 15:40 the sighting was verified, along with distance, course, and speed. The Japanese fleet was 275 miles out, moving due west at a speed of 20 knots. [33] The Japanese were at the limit of TF 58's strike range, and daylight was slipping away. Mitscher decided to launch an all-out strike. After the first attack group had launched, a third message arrived, indicating the Japanese fleet were 60 miles farther out than previously indicated. [34] The first launch would be at their limits of fuel, and would have to attempt landing at night. Mitscher canceled the second launch of aircraft, but chose not to recall the first launch. Of the 240 planes that were launched for the strike, 14 aborted for various reasons and returned to their ships. The 226 planes that continued consisted of 95 Hellcat fighters (some carrying 500-pound bombs), 54 Avenger torpedo bombers (only a few carrying torpedoes, the rest four 500-pound bombs) and 77 dive bombers (51 Helldivers and 26 Dauntlesses). [35] The TF 58 aircraft arrived over the Japanese fleet just before sunset. [36]

The fighter cover Ozawa was able to put up would have been good by 1942 standards, but the 35 or so fighters he had available were overwhelmed by the 226 incoming aircraft of Mitscher's attack. Though these few were often skilfully handled, and the Japanese antiaircraft fire was intense, the U.S. planes were able to press in on the attack. [37]

The first ships sighted by the U.S. strike were oilers, thirty miles before the carrier groups. The strike group from the Wasp, more concerned with their low fuel levels than with finding the more important Japanese carriers and battleships, dived on the tankers. [38] Two of these were damaged so severely that they were later scuttled, while a third was able to put out fires and get underway.

The carrier Hiyō was attacked and hit by bombs and aerial torpedoes from four Grumman TBF Avengers from Belleau Wood. Hiyō was set afire after a tremendous blast from leaking aviation fuel. Dead in the water, she sank stern first, with the loss of 250 officers and men. The rest of her crew, about one thousand, were rescued by Japanese destroyers.

The carriers Zuikaku, Junyō, and Chiyoda were damaged by bombs. Returning American strike pilots generally assessed these carriers as more crippled than they actually were, mistaking for devastating direct hits what Japanese post-war records revealed to have actually been huge geysers caused by near misses. [39] The battleship Haruna was also hit by two bombs, including one directly on a main battery turret. Damage was contained and she was able to keep station, however, partly due to her captain's prompt decision to flood the turret's magazine to avoid the possibility of an explosion.

Twenty American aircraft in the strike were destroyed by Japanese fighters and anti-aircraft fire that made up for a relative lack of accuracy with high volume of fire. [40]

After the protracted strike, it became clear that most of the aircraft returning to their carriers were running dangerously low on fuel, and to worsen matters, night had fallen. At 20:45, the first returning U.S. aircraft reached TF 58. Knowing his aviators would have difficulty finding their carriers, Mitscher decided to illuminate his carriers, shining searchlights directly up into the night, despite the risk of attack from submarines and night-flying aircraft. Picket destroyers fired starshells to help the aircraft find the task groups.

Planes were given clearance to land on any available flight deck (not just their home carriers, as usual), and many did land on other carriers. Despite this, 80 of the returning aircraft were lost. Some crashed on flight decks, but the majority ditched into the sea. Some pilots intentionally went down in groups to facilitate rescue, and more ditched individually either in a controlled landing, with a few gallons of fuel left, or in a crash after their engines ran dry. [41] Approximately three-quarters of the crews were rescued from the sea, either that night from crash locations within the task forces, or over the next few days for those further out, as search planes and destroyers criss-crossed the ocean looking for them. [N 5]

Aftermath

Japanese

That night, Toyoda ordered Ozawa to withdraw from the Philippine Sea. U.S. forces gave chase, but the battle was over.

The four Japanese air strikes involved 373 carrier aircraft, of which 130 returned to the carriers; many of them were subsequently lost when Taiho and Shōkaku were sunk. After the second day of the battle, losses totaled three carriers, more than 433 carrier aircraft, and around 200 land-based aircraft.

In the five major "carrier-on-carrier" battles, from Battle of the Coral Sea (May 1942) to Philippine Sea, [N 1] the IJN had lost nine carriers, while the USN had lost three. The aircraft and trained pilots lost at Philippine Sea were an irreplaceable blow to the already outnumbered Japanese fleet air arm. The Japanese had spent the better part of a year (following the Battle of the Santa Cruz Islands) reconstituting their depleted carrier air groups, and the American Fast Carrier Task Force had destroyed 90% of it in two days. The Japanese had only enough pilots left to form the air group for one of their light carriers. As a consequence, during the Battle off Cape Engaño, four months later, they sent out a decoy carrier group with only 108 aircraft, across six carriers (two were hybrid-carriers), that was sacrificed in an attempt to draw the American fleet away from protecting the troops and supplies being landed for the Battle of Leyte.

The Japanese military, which had hidden the extent of their previous losses from the Japanese public, continued this policy. Though the occurrence of the simultaneous Battle of the Philippine Sea and the Battle of Saipan were made known to the public, the extent of the disasters was withheld. [42]

American

Losses on the U.S. side on the first day were only 23 aircraft. The second day's airstrike against the Japanese fleet saw most of the aircraft losses for the U.S.; of the 226 aircraft launched on the strike, only 115 returned. Twenty were lost to enemy action in the attack, and 80 were lost when they ran out of fuel returning to their carriers and had to ditch into the sea, or crashed attempting to land at night. [43]

Spruance's conservative battle plan for Task Force 58, while sinking just one light carrier, severely weakened the Japanese naval aviation forces by killing most of the remaining trained pilots and destroying their operational reserves of naval aircraft, a blow that effectively shattered the Japanese naval air arm, from which it never recovered. [44] Without the time or resources to build sufficient aircraft and train new pilots, the surviving Japanese carriers were almost useless in an offensive role, a fact the Japanese acknowledged by using them as sacrificial decoys at Leyte Gulf. With the effective crippling of her best striking arm, Japan chose to rely increasingly on land-based kamikaze suicide aircraft in a last-ditch effort to make the war so costly that the U.S. would offer peace terms better than unconditional surrender.

Spruance was heavily criticized after the battle by many officers, particularly the aviators, for his decision to fight the battle cautiously rather than exploiting his superior forces and intelligence data with a more aggressive posture. By failing to close on the enemy earlier and more forcefully, his critics argue, he squandered an opportunity to destroy the entire Japanese Mobile Fleet. "This is what comes of placing a non-aviator in command over carriers" was the common refrain. [45] Admiral John Towers, a naval aviation pioneer and Deputy Commander-in-Chief Pacific Fleet, demanded that Spruance be relieved. [46] The request was denied by Admiral Nimitz. Moreover, Spruance was supported in his decision by Nimitz, Kelly Turner, and the top naval commander, Admiral Ernest King, Chief of Naval Operations. [47]

Spruance's caution (in particular, his suspicion of a diversionary force) can be compared with Halsey's headlong pursuit of an actual diversionary force at Leyte Gulf four months later. Halsey left the American invasion fleet weakly protected during the Battle off Samar, nearly resulting in a devastating attack on the landing force by Japanese heavy surface units. It was prevented only by the heroic and desperate attack of 5 small American surface ships, which put up such an intense fight that the 23 ship strong Japanese fleet thought they were engaging a much larger force and withdrew. In addition, by focusing on defense first, the carrier forces under Spruance at Philippine Sea suffered no significant harm. This was in contrast to Leyte Gulf when Halsey's carriers were trying to neutralize the enemy airfields and attack the enemy fleet simultaneously, such that a Japanese bomber managed to evade the Combat Air Patrols to fatally cripple the light carrier USS Princeton. Likewise, during the carrier-based air raids, U.S. carriers were in a vulnerable position due to readiness to launch strikes, and the low visibility coupled with radar confusion let a Japanese bomber slip through and severely damage USS Franklin. [48]

Although the American carrier aircraft strikes caused less destruction to enemy naval vessels than earlier battles, American submarines made up for it by sinking two of the three Japanese fleet carriers, which left Zuikaku as the only remaining operational IJN fleet carrier.

The American F6F Hellcat fighter proved its worth, as its powerful engine generated superior speed, while its heavier armor and firepower made it rugged and deadly. The Japanese on the other hand were still flying the A6M Zero which, though highly maneuverable and revolutionary during the early stages of the Pacific War, was now underpowered, fragile, and essentially obsolete in comparison by 1944. In addition, the D4Y "Judy", though fast, was also fragile and easily set on fire. The Japanese naval airmen were also inadequately trained. The Japanese training programs could not replace the quality aviators lost during the past two years of the Pacific Campaign. Flying against the well-trained and often veteran U.S. aviators, it was a one-sided contest. The Americans lost fewer than two dozen Hellcats in air-to-air combat. Naval aviation and AA fire shot down nearly 480 Japanese aircraft, 346 of those carrier aircraft on 19 June alone. [49] [ page needed ]

See also

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References

Notes

  1. 1 2 Historians, such as Prof. Douglas V. Smith of the Naval War College in the cited work, count the five "major" battles as Coral Sea, Midway, Eastern Solomons, Santa Cruz, and Philippine Sea. The October 1944 Battle off Cape Engaño did see a decoy force built around six IJN carriers, divested of all but 108 aircraft, lure an American-led fleet, including ten carriers with 600–1,000 aircraft, away from protecting the transports at the landing beaches of Leyte. That ostensible IJN carrier group was quickly destroyed.
  2. 1 2 The Americans now used and were becoming practiced with the new radar-based Command Information Center, and anti-air defensive firepower was delivered on target. Unlike the overburdened radio channels and lost messages experienced in the Battle of Midway, the U.S. fleet had sufficient frequencies and communications training, discipline, experience and doctrine to maintain good command coordination and control during the largest such battle ever.
  3. 1 2 Radar directed detection and interception allowed the American Combat Air Patrol (CAP) to intercept and surprise 370 inbound Japanese over fifty miles from the carriers and destroy about 250 in just that one encounter. ("The Race for Radar and Stealth", 2006, Weapons Races program on the Military Channel affiliate of the Discovery network, rebroadcast periodically.) Japanese aircraft which managed to get through the CAP faced a well-organized line of cruisers and battleships, thanks to the new command and control philosophy which concentrated anti-aircraft firepower, and they were equipped with the highly effective VT-fuzed anti-aircraft shells. None of the American carriers were damaged, despite several near misses, while one battleship suffered a bomb hit but remained fully operational.
  4. "Hey Rube!" was the old circus cry used to call for help in a fight. The navy borrowed it to signal fighters they were needed over the ship.
  5. The United States Navy customarily rewarded the crew of a ship that returned a downed pilot to his ship of origin with several gallons of ice cream. (Stark, Norman (2002-09-17). "My True Worth – 10 Gallons of Ice Cream". Archived from the original on 2008-11-20. Retrieved 2015-08-26.) (John, Philip (2004). USS Hancock CV/CVA-19 Fighting Hannah. Turner Publishing Company. p. 122. ISBN   1-56311-420-8.)

Citations

  1. Crowl 1995, p. 441
  2. 1 2 3 Shores 1985, p. 205
  3. Smith, Douglas Vaughn (2005-06-27). "Chapter I: Introduction". Carrier Battles: Command Decision in Harm's Way (PDF) (Thesis). Florida State University . Retrieved 2019-01-14. The reference to "five carrier battles" was reiterated in then Naval War College Prof. D. V. Smith's 2013-11-02 book of same title, ISBN 9781612514420, published by Naval Institute Press
  4. Polmar 2008, pp. 377–400.
  5. Shores 1985, p. 189.
  6. Potter 1990, p. 160.
  7. 1 2 3 4 5 Roscoe, T. (1949) Pig Boats New York: Bantam Books, ISBN   0553130404
  8. 1 2 3 Willmott 1984, p. 143.
  9. Willmott 1984, p. 175.
  10. Willmott 1984, p. 176.
  11. Willmott 1984, p. 181.
  12. Willmott 1984, p. 200.
  13. 1 2 3 Willmott 1984, p. 182.
  14. Potter 1990, p. 146.
  15. History of U.S. Marine Corps Operations in World War II, pp. 260-61. "Strategic Victory in the Marianas Liberation of Guam; Capture of Saipan and Tinian"
  16. Morison, Samuel Eliot, "History of United States Naval Operations in World War II: Vollume Eight - New Guinea and the Marianas March 1944 - August 1944," Little, Brown and Company, Boston, 1953, 1989, Library of Congress card number 53-7298, page 221.
  17. Potter 1990, p. 145.
  18. 1 2 Potter 1990, p. 148.
  19. Taylor 1991, p. 220.
  20. Potter 1990, p. 149.
  21. Potter 1990, p. 150.
  22. 1 2 Potter 1990, p. 151.
  23. Taylor 1991, p. 222.
  24. The Battle of the Philippine Sea 19-20 June 1944
  25. C. N. Trueman, "The Battle of the Philippine Sea" The History Learning Site
  26. Taylor 1991, p. 223.
  27. 1 2 Potter 1990, p. 154.
  28. Battle of the Philippine Sea at Combinedfleet.com
  29. Morison, Samuel Eliot, "History of United States Naval Operations in World War II: Vollume Eight - New Guinea and the Marianas March 1944 - August 1944," Little, Brown and Company, Boston, 1953, 1989, Library of Congress card number 53-7298, page 262.
  30. Potter 1990, p. 155.
  31. Potter 1990, pp. 155-156.
  32. Hearn, Chester G. Navy: An Illustrated History: The U.S. Navy from 1775 to the 21st Century. Page 80.
  33. Taylor 1991, p. 231.
  34. Taylor 1991, p. 232.
  35. Y'Blood 1981, p. ?.
  36. Taylor 1991, p. 233.
  37. Potter 1990, p. 166.
  38. Tillman 2006, p. ?.
  39. Tillman 2006, p. ??.
  40. Tillman 2006, p. ???.
  41. Tillman 2006, p. ????.
  42. Hoyt 1986, p. 352.
  43. Potter 1990, p. 170.
  44. Willmott 1984, p. 204.
  45. Potter 1990, pp. 174.
  46. Potter 1990, pp. 173-174.
  47. Potter 1990, pp. 175.
  48. Morison 1953, p. ?.

Bibliography

Further reading

Coordinates: 20°00′00″N130°00′00″E / 20.0000°N 130.0000°E / 20.0000; 130.0000