Hirohito, posthumously honored as Emperor Shōwa, was the 124th emperor of Japan according to the traditional order of succession, reigning from 1926 until his death in 1989. He was one of the longest-reigning monarchs in the world, with his reign of 62 years being the longest of any Japanese emperor.
Prince Fumimaro Konoe was a Japanese politician who served as prime minister of Japan from 1937 to 1939 and from 1940 to 1941. He presided over the Japanese invasion of China in 1937 and the breakdown in relations with the United States, which ultimately culminated in Japan's entry into World War II. He also played a central role in transforming his country into a totalitarian state by passing the State General Mobilization Law and founding the Imperial Rule Assistance Association while dissolving all other political parties.
The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service on the American naval base at Pearl Harbor in Honolulu, Hawaii, in the United States, just before 8:00 a.m. on Sunday, December 7, 1941. At the time, the United States was a neutral country in World War II. The attack on Hawaii and other U.S. territories led the United States to formally enter World War II on the side of the Allies the day following the attack, on December 8, 1941. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.
Kichisaburō Nomura was an admiral in the Imperial Japanese Navy and was the ambassador to the United States at the time of the attack on Pearl Harbor.
Osami Nagano was a Marshal Admiral of the Imperial Japanese Navy and one of the leaders of Japan's military during most of the Second World War. In April 1941, he became Chief of the Imperial Japanese Navy General Staff. In this capacity, he served as the navy's commander-in-chief in the Asia-Pacific theater of World War II until his removal in February 1944. After the war, he was arrested by the International Military Tribunal for the Far East but died of natural causes in prison during the trial.
Various unproven conspiracy theories allege that U.S. government officials had advance knowledge of Japan's December 7, 1941, attack on Pearl Harbor. Ever since the Japanese attack, there has been debate as to why and how the United States was caught off guard, and how much and when American officials knew of Japanese plans for an attack. In September 1944, John T. Flynn, a co-founder of the non-interventionist America First Committee, launched a Pearl Harbor counter-narrative when he published a 46-page booklet entitled The Truth about Pearl Harbor, arguing that Roosevelt and his inner circle had been plotting to provoke the Japanese into an attack on the U.S. and thus provide a reason to enter the war since January 1941. Flynn was a political opponent of Roosevelt, and had strongly criticized him for both his domestic and foreign policies. In 1944, a congressional investigation conducted by both major political parties provided little by way of vindication for his assertions, despite Flynn being chief investigator.
Joseph Clark Grew was an American career diplomat and Foreign Service officer. He is best known as the ambassador to Japan from 1932 to 1941 and as a high official in the State Department in Washington from 1944 to 1945. He opposed American hardliners, sought to avoid war, and helped to ensure the soft Japanese surrender in 1945 that enabled a peaceful American occupation of Japan after the war.
Saburō Kurusu was a Japanese career diplomat. He is remembered now as an envoy who tried to negotiate peace and understanding with the United States while the Japanese government under Emperor Shōwa was secretly preparing the attack on Pearl Harbor.
The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during World War II (1939–1945) to oppose the Axis powers. Its principal members by the end of 1941 were the "Big Four" – the United Kingdom, United States, Soviet Union, and China.
The McCollum memo, also known as the Eight Action Memo, was a memorandum, dated October 7, 1940, sent by Lieutenant Commander Arthur H. McCollum in his capacity as director of the Office of Naval Intelligence's Far East Asia section. It was sent to Navy Captains Dudley Knox, who had reservations with the actions described within the memo, and Walter Stratton Anderson. Robert Stinnett asserts this memo was part of a conspiracy by the Roosevelt Administration to secretly provoke the Japanese to attack the United States in order to bring the United States into the European war without generating public contempt over broken political promises. Germany was not obliged to assist Japan if she attacked a third party, as the Tripartite Pact was defensive in nature, something overlooked by Stinnett. It was not until November 1941 that Germany had given Japan secret assurances outside of the treaty provisions. Stinnett has attributed to McCollum a position McCollum later expressly repudiated. U.S. military historian Conrad Crane rejected Stinnett's assertions as a distortion of the original document.
The Japanese invasion of French Indochina, was a short undeclared military confrontation between Japan and Vichy France in northern French Indochina. Fighting lasted from 22 to 26 September 1940; the same time as the Battle of South Guangxi in the Sino-Japanese War, which was the main objective as to why Japan occupied Vietnam during this time.
The following events occurred in December 1941:
The government of the United Kingdom declared war on the Empire of Japan on 8 December 1941, following the Japanese attacks on British Malaya, Singapore, and Hong Kong on the previous day as well as in response to the bombing of the US fleet at Pearl Harbor.
A series of events led to the attack on Pearl Harbor. War between the Empire of Japan and the United States was a possibility each nation's military forces had planned for after World War I. The expansion of American territories in the Pacific had been a threat to Japan since the 1890s, but real tensions did not begin until the Japanese invasion of Manchuria in 1931.
Japan's attack on Pearl Harbor took place on December 7, 1941. The United States military suffered 19 ships damaged or sunk, and 2,403 people were killed. Its most significant consequence was the entrance of the United States into World War II. The US had previously been officially neutral but subsequently entered the Pacific War, and after Italy's declaration of war and Germany's declaration of war shortly after the attack, the Battle of the Atlantic and the European theatre of war. Following the attack, the US interned 120,000 Japanese Americans, 11,000 German Americans, and 3,000 Italian Americans.
On December 8, 1941, at 12:30 PM ET the United States Congress declared war, on the Empire of Japan in response to its surprise attack on Pearl Harbor and subsequent declaration of war the prior day. The Joint Resolution Declaring that a state of war exists between the Imperial Government of Japan and the Government and the people of the United States and making provisions to prosecute the same was formulated an hour after the Infamy Speech of President Franklin D. Roosevelt. Following the U.S. declaration, Japan's allies, Germany and Italy, declared war on the United States, bringing the United States fully into World War II. The Japanese government had originally intended to deliver their own declaration of war thirty minutes before the attack, but the Japanese embassy in Washington took too long to decode the 5,000-word document.
The attack on Pearl Harbor has received substantial attention in popular culture in multiple media and cultural formats including film, architecture, memorial statues, non-fiction writing, historical writing, and historical fiction. Today, the USS Arizona Memorial on the island of Oahu honors the dead. Visitors to the memorial reach it via boats from the naval base at Pearl Harbor. The memorial was designed by Alfred Preis, and has a sagging center but strong and vigorous ends, expressing "initial defeat and ultimate victory". It commemorates all lives lost on December 7, 1941.
Japan participated in World War II from 1939 to 1945 as a member of the Axis. World War II and the Second Sino-Japanese War encapsulate a significant period in the history of the Empire of Japan, marked by significant military campaigns and geopolitical maneuvers across the Asia-Pacific region. Spanning from the early 1930s to 1945, Japan employed expansionist policies and aggressive military actions, including the invasion of the Republic of China, and the annexation of French Indochina.
The third presidential term of Franklin D. Roosevelt began on January 20, 1941, when he was once again inaugurated as the 32nd president of the United States, and the fourth term of his presidency ended with his death on April 12, 1945. Roosevelt won a third term by defeating Republican nominee Wendell Willkie in the 1940 United States presidential election. He remains the only president to serve for more than two terms. Unlike his first two terms, Roosevelt's third and fourth terms were dominated by foreign policy concerns, as the United States became involved in World War II in December 1941.
The foreign policy of the United States was controlled personally by Franklin D. Roosevelt during his first and second and third and fourth terms as the president of the United States from 1933 to 1945. He depended heavily on Henry Morgenthau Jr., Sumner Welles, and Harry Hopkins. Meanwhile, Secretary of State Cordell Hull handled routine matters. Roosevelt was an internationalist, while powerful members of Congress favored more isolationist solutions in order to keep the U.S. out of European wars. There was considerable tension before the Attack on Pearl Harbor in December 1941. The attack converted the isolationists or made them irrelevant. The US began aid to the Soviet Union after Germany invaded it in June 1941. After the US declared war in December 1941, key decisions were made at the highest level by Roosevelt, Britain's Winston Churchill and the Soviet Union's Joseph Stalin, along with their top aides. After 1938 Washington's policy was to help China in its war against Japan, including cutting off money and oil to Japan. While isolationism was powerful regarding Europe, American public and elite opinion strongly opposed Japan.
