Military history of the Netherlands during World War II

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Major Dutch defence lines Dutch defense lines - ln-en.jpg
Major Dutch defence lines

The Netherlands entered World War II on May 10, 1940, when invading German forces quickly overran the country. On December 7, 1941, after the attack on Pearl Harbor, the Netherlands government in exile also declared war on Japan. Operation Market Garden, which started in 1944, liberated the southern and eastern parts of the country, but full liberation did not come until the surrender of Germany on May 5, 1945.

Contents

Prelude

When World War II erupted in September 1939, most in the Netherlands believed that the country could remain neutral, as it had in World War I. The months of "Phoney War" following the German invasion of Poland seemed to justify this attitude. The Royal Netherlands Army did immediately mobilize in 1939, but was not in full strength until April 1940.

Warning signs to the contrary went unheeded. Among them were some incidents, most notably the Venlo incident in which members of the German Abwehr operating in the Netherlands abducted two members of the British SIS and killed one Dutch intelligence officer. More direct were worrying signals from Berlin received by the government beginning in the first months of 1940. The Dutch military attaché there, Major Bert Sas, had established good relations with Colonel Hans Oster, who occupied a high position in the Abwehr. Oster warned Sas about German plans for an offensive against the Netherlands, Belgium and France, and Sas passed the warnings on. The government in the Netherlands, however, did not take them seriously, as the offensive was postponed several times, even though Oster did eventually offer the correct date of May 10, 1940.

Dutch defensive works

Overview

Dutch pre-World War II carbine (left view).jpg
Left side view
Dutch pre-World War II carbine (right view).jpg
Right side view
Dutch Mannlicher carbine from the pre–World War II period

The Dutch army was not considered formidable even at the end of World War I, and it did not prosper during the interwar years. By the time of the German invasion in 1940, only 20 battalions were operational for the defense of the Netherlands, and most were poorly prepared for combat. Only a few had modern weapons; the majority of soldiers carried carbines of 19th-century vintage, and most artillery was similarly outdated. The Dutch army also had little armor, and its air arm, the Luchtvaartafdeeling, had but a handful of reasonably modern aircraft, most notably the Fokker G.1 twin-engine fighter-bomber and the fixed-undercarriage Fokker D.XXI single-seat fighter, with which to face the Luftwaffe.

Reasons cited for the weakness of the Netherlands military include decay during the long lapse of time since its last active participation in a war, the 1873–1903 Aceh War; the effects of widespread pacifism during the 1920s and 1930s; budget cuts, particularly during the Great Depression; and the unrealistic belief by Dutch politicians that the League of Nations would offer sufficient protection from aggression. Certainly, the Dutch military faced an unfavorable political climate between the wars. For example, in 1925, when rebuilding the Dutch army into a modern fighting force would have required increased funding of 350 million gulden, the government instead cut the army's budget by 100 million gulden. A committee tasked with finding further cuts concluded that the army was already so weak that any reductions would endanger its sustainability; the government thereupon disbanded the committee and appointed a new, more aggressive one, which recommended cutting another 160 million gulden. Meanwhile, potential human capital was allowed to dissipate; compulsory service was cut back from 24 months to six, barely enough for the most basic of training.

Not until 1936 did the Dutch government recognize the growing threat of Nazi Germany, but the resultant budget increases were too small and too late to establish an effective defense of the country. One factor was practical: by that time, many European countries were rearming and had already placed orders taxing the available capacity of munitions plants, hindering Dutch efforts at procurement. A second factor was continued economic pressure, as Defense Minister Adriaan Dijxhoorn refused to authorize funds for modernizing both main Dutch lines of defense against attack from the east, the Waterline and the Grebbe line. The failure of General Izaak H. Reijnders, leader of the Dutch General Staff, to obtain more funding for these lines led to his replacement on February 6, 1940, by General Henri Winkelman, who opted to concentrate on modernizing the Grebbeline, with its largely wooden bunkers, because German artillery brought up as deep within the country as the Waterline would be within range of Amsterdam. Modernization of the Grebbeline, however, would not be complete or effective by the time of the invasion, in part because the government balked at the expense of clearing forests and houses blocking lines of sight from many of the fortifications.

Royal Netherlands Army

There was just enough artillery to equip the larger army units: eight infantry divisions (combined in four Army Corps), one Light (i.e. motorised) Division and two independent brigades (Brigade A and Brigade B), each with the strength of half a division or five battalions. All other infantry combat unit troops were raised as light infantry battalions that were dispersed all over the territory to delay enemy movement. [1] About two thousand pillboxes had been constructed, [2] but in lines without any depth. Modern large fortresses like the Belgian stronghold of Eben Emael were nonexistent; the only modern fortification complex was that at Kornwerderzand, guarding the Afsluitdijk. Total Dutch army forces equalled 48 regiments of infantry as well as 22 infantry battalions for strategic border defence. In comparison, Belgium, despite a smaller and more aged male population, fielded 22 full divisions and the equivalent of 30 divisions when smaller units were included.

On 10 May, the most conspicuous deficiency of the Dutch Army lay in its shortage of armour. [3] Whereas the other major participants all had a considerable armoured force, the Netherlands had not been able to obtain the minimum of 146 modern tanks (110 light, 36 medium) they had already considered necessary in 1937. [4] A single Renault FT tank, for which just one driver had been trained and which had the sole task of testing antitank obstacles, had remained the only example of its kind and was no longer in service by 1940. [5] There were two squadrons of armoured cars, each with a dozen Landsverk M36 or M38 vehicles. [6] Another dozen DAF M39 cars were in the process of being taken into service, some still having to be fitted with their main armament. [7] A single platoon of five Carden-Loyd Mark VI tankettes used by the Artillery completed the list of Dutch armour.

The Dutch Artillery had available a total of 676 howitzers and field guns: 310 Krupp 75 mm field guns, partly produced in licence; 52 105 mm Bofors howitzers, the only really modern pieces; 144 obsolete [8] Krupp 125 mm guns; 40 150 mm sFH13's; 72 Krupp 150 mm L/24 howitzers and 28 Vickers 152 mm L/15 howitzers. As antitank-guns 386 Böhler 47 mm L/39s were available, which were effective weapons but too few in number, being only at a third of the planned strength; [9] another three hundred antiquated [10] 6 Veld (57 mm) and 8 cm staal (84 mm) field guns performed the same role for the covering forces. Only eight of the 120 modern 105 mm pieces ordered from Germany had been delivered at the time of the invasion. Most artillery was horse-drawn. [11]

The Dutch Infantry used about 2,200 7.92 mm Schwarzlose M.08 machine guns, partly licence produced, and eight hundred Vickers machine guns. Many of these were fitted in the pillboxes; each battalion had a heavy machine gun company of twelve. The Dutch infantry squads were equipped with an organic light machine gun, the M.20 Lewis machine gun, of which about eight thousand were available. Most Dutch infantry were equipped with the Geweer M.95 rifle, adopted in 1895. [12] There were but six 80 mm mortars for each regiment. This lack of firepower seriously impaired the fighting performance of the Dutch infantry. [13]

Despite the Netherlands being the seat of Philips, one of Europe's largest producers of radio equipment, the Dutch army mostly used telephone connections; only the Artillery had been equipped with the modest number of 225 radio sets. [11]

Dutch mobile anti-aircraft gun. This AA unit was actually a German AA truck which the Dutch bought from the Allies who captured it in late 1918 from the defeated German army. BATTLENETHERLANDS2.jpg
Dutch mobile anti-aircraft gun. This AA unit was actually a German AA truck which the Dutch bought from the Allies who captured it in late 1918 from the defeated German army.

Dutch Air Forces

The Dutch air force, which was not an independent arm of the Dutch armed forces, but part of the Army, [3] on 10 May operated a fleet of 155 aircraft: 28 Fokker G.1 twin-engine destroyers; 31 Fokker D.XXI and seven Fokker D.XVII fighters; ten twin-engined Fokker T.V, fifteen Fokker C.X and 35 Fokker C.V light bombers, twelve Douglas DB-8 dive bombers (used as fighters) [14] and seventeen Koolhoven FK-51 reconnaissance aircraft—thus 74 of the 155 aircraft were biplanes. Of these aircraft 125 were operational. [15] Of the remainder the air force school used three Fokker D.XXI, six Fokker D.XVII, a single Fokker G.I, a single Fokker T.V and seven Fokker C.V, along with several training aeroplanes. Another forty operational aircraft served with the Marineluchtvaartdienst (naval air service) along with about an equal number of reserve and training craft. [16] The production potential of the Dutch military aircraft industry, consisting of Fokker and Koolhoven, was not fully exploited due to budget limitations. [17]

Training and readiness

Not only was the Royal Netherlands Army poorly equipped, it was also poorly trained. There had especially been little experience gained in the handling of larger units above the battalion level. From 1932 until 1936, the Dutch Army did not hold summer field manoeuvres in order to conserve military funding. [18] Also, the individual soldier lacked many necessary skills. Before the war only a minority of young men eligible to serve in the military had actually been conscripted. Until 1938, those who were enlisted only served for 24 weeks, just enough to receive basic infantry training. [19] That same year, service time was increased to eleven months. [20] The low quality of conscripts was not compensated by a large body of professional military personnel. In 1940, there were only 1206 professional officers present. [21] It had been hoped that when war threatened, these deficiencies could be quickly remedied but following the mobilisation of all Dutch forces on 28 August 1939 (bringing Army strength to about 280,000 men) [22] readiness only slowly improved: most available time was spent constructing defences. [23] During this period, munition shortages limited live fire training, [24] while unit cohesion remained low. [25] By its own standards the Dutch Army in May 1940 was unfit for battle. It was incapable of staging an offensive, even at division level, while executing manoeuvre warfare was far beyond its capacities. [26]

German preparations

For Germany, the Netherlands was only of secondary importance in the attack on France. Germany's main worry was the route through Limburg, to eliminate the delay caused by the Liege corridor that had hindered German forces during World War I.

The goal of the German attack plan was to eliminate the country as soon as possible. The 18th Army and the 9th Panzer Division were allotted for this task.

The 18th Army was to attack the Netherlands above the Rhine, most notably breaking through the eastern defences of Fortress Holland (formed by the Grebbeline) and crossing the Afsluitdijk. The 9th Panzer Division was to move through the southern part of the Netherlands and attack the Moerdijk Bridge.

Furthermore, the 22nd Air Landing Division and the 7th Fliegerdivision were to land around The Hague, in order to capture Queen Wilhelmina, the Dutch government, and the General Staff. They also were to capture the Moerdijk Bridge and the bridges over the Maas in Rotterdam so that the 9th Panzer Division could easily cross these.

In preparation for their attack, German officers had conducted extensive espionage research. The Dutch did not hinder them in this—for example, a watchtower near the Grebbe Line was kept open because, as Prime Minister Dirk Jan de Geer said, "it would harm the Dutch economy." Although after mobilisation the lines would be closed to the public, many high-ranking officers from the German army, including a few colonels, were able to see the Dutch lines and write down where the bunkers were, so artillery could destroy them.

Based on these observations, the Germans thought they could capture the Netherlands in one to two days.

Campaign

In the first days of May 1940, the Dutch government received several indications of German activity near the border, and on May 7 all leave was cancelled and the army was put on alert. Finally, on May 10, 3:55, the German army invaded the Netherlands.

The rivers IJssel and Maas, running through the Netherlands from south to north and from east to west, were the first obstacles that the Germans encountered. They had created special units to capture the bridges over these rivers (sometimes even clad in Dutch uniforms), but in all but a few places the Dutch defenders were able to demolish the bridges. The German advance was further hindered by a line of pillboxes along both rivers, but despite heavy resistance they succeeded in crossing both IJssel and Maas by midday.

In the meantime, the airborne forces had taken the Dutch by surprise. German paratroopers succeeded in taking the Moerdijk bridges, the traffic bridge near Dordrecht and partially the traffic bridge in Rotterdam. They also captured the airfields of Waalhaven (near Rotterdam), and Ypenburg, Ockenburg and Valkenburg (around The Hague). However, Dutch resistance was again heavier than expected and the Dutch succeeded in keeping the paratroopers out of The Hague itself. Indeed, by the evening, all three airfields around The Hague had been recaptured by the Dutch.

Grebbeberg Grebbeberg the Netherlands.jpg
Grebbeberg

The next day, the attack on the Grebbe Line started. The Germans attacked its most southern point, the Grebbeberg, where there were no inundations. Instead, there was a front line of outposts, a main defense line and finally a stop line, from which possible breaches in the main line could be contained and repaired. After an artillery barrage, the SS regiment "Der Führer" attacked the outposts. Once again, despite stiff resistance, the Germans succeeded in capturing the northern part of the outpost line, after which they could easily outflank the southern part. However, it took them until 16:00 to capture all outposts.

By now, French reinforcements had started to arrive from the south. Because of miscommunications between the Dutch and the French, and also because the Moerdijk Bridge, the only link between the eastern and southern parts of the Netherlands, was still in German hands, their effectiveness was limited.

On May 12, the German 1st Cavalry Division tried to cross the Afsluitdijk. However, at Kornwerderzand, the Dutch had built modern concrete fortifications to protect the dam. Moreover, the dam offered no cover whatsoever and the attack was easily repulsed (with the help of a Dutch gunboat). The Germans would try again on May 13, but with no success. The Kornwerderzand fortification would hold out until the Dutch surrender.

On the same day, the Germans attacked the main defense line of the Grebbe Line. Sometimes using Dutch POWs as a shield (a war crime), by the end of the day they had captured this line as well. The Dutch tried to organize a counter-attack during the night, as they thought there were only some hundred German troops opposing them (the real number was probably somewhere around two thousand), but this met with little success. In places, they were even fired upon by other Dutch troops who had not been notified of the counter-attack.

Finally, on May 13, the 9th Panzer Division brushed aside the French and joined up with the paratroopers. However, they met with heavy resistance in Rotterdam, where their advance was stopped.

On the same day, the Germans mounted their final attack against the Grebbe Line. The stop line, the last resort of the Dutch defenders, collapsed and the Germans broke through. Isolated pockets of Dutch troops continued to resist, but a night attack to dislodge the Germans failed. As there were no reserve troops, it was clear that defeat was imminent: there was nothing between the Germans and the North Sea but the famous Waterlinie (Water Line) was only very sketchily prepared.

On May 14, the Dutch commander at Rotterdam, Colonel Scharroo, received an ultimatum: if he did not surrender, the town would be bombed. As the ultimatum was not signed, Scharroo sent it back. A few hours later, he received another ultimatum, this time duly signed by General Schmidt, the German commander at Rotterdam. Schmidt did not know that a squadron of bombers was already on its way to bomb Rotterdam. The Germans tried to warn the bomber crews by shooting red flares, but only half of the squadron noticed this; the other half continued on their mission and dropped their bombs on the city (see the Rotterdam Blitz).

Under the threat that other major cities like Amsterdam and Utrecht would share the fate of Rotterdam in which over 900 civilians were killed, the Dutch decided to surrender. On May 15, in Rijsoord, General Winkelman signed the surrender of the Netherlands, with the exception of the province of Zeeland, where the French still operated (Zeeland held out until May 19, after the city of Middelburg was bombed). The Dutch colonies also continued the battle.

Casualties were high in the five day campaign: over 10,000 Dutch soldiers were killed, injured or declared missing.

Fighting on

Though the Netherlands was occupied, by no means was all lost. The colonies (most notably the Dutch East Indies) were still free, and Queen Wilhelmina and the Dutch government had left the Netherlands for London.

The Royal Netherlands Navy had managed to get most of its ships to England (one, the light cruiser Jacob van Heemskerk was towed since its construction was incomplete). Also, the Netherlands had a large merchant marine, which would contribute greatly to the Allied war effort during the rest of the war.

A few Dutch pilots also had escaped and joined the RAF to fight in the Battle of Britain. In July 1940, two all-Dutch squadrons were formed with personnel and Fokker seaplanes from the Dutch naval air force: 320 Squadron and 321 Squadron (which afterwards moved to Ceylon). The Royal Netherlands Military Flying School was re-established at Hawkins Field, Jackson, Mississippi. In 1943, an all-Dutch fighter squadron was formed in the UK, 322 Squadron.

In 1942, an all-Dutch brigade was formed, the Princess Irene Brigade. This brigade would go on to participate in Operation Overlord in 1944.

Inside the Netherlands, both passive and active resistance was widespread throughout the country, with the first Dutch Resistance organisation, the Communist Party of the Netherlands, holding their first meeting the day after the Dutch capitulation.

The Allied Special Forces also recruited and trained a number of Dutch officers for Operation Jedburgh teams and for the Anglo Dutch Country Section of Force 136.

Colonial possessions

East Indies

KNIL units passing light cruiser De Ruyter in Soerabaja, c. 1940 Hr. Ms. De Ruyter moored in Soerabaja.jpg
KNIL units passing light cruiser De Ruyter in Soerabaja, c. 1940

After the Japanese attack on Pearl Harbor, the Dutch government declared war on Japan. Like the defense of its mother country, the defense of the Netherlands East Indies (NEI) had been hopelessly neglected; the strongest naval units available were three light cruisers (De Ruyter, Java and Tromp), though they were supported by a relatively large submarine force.

The Dutch participated in the ABDACOM, a joint-command for all American, British, Dutch and Australian units in the area to defend Southeast Asia against the Japanese advance. The Dutch military hastily scrambled its forces to provide an adequate defense. By the time of the Japanese invasion, the Royal Netherlands East Indies Army ("KNIL") numbered about 85,000 troops while the Royal Netherlands East Indies Army Air Force ("ML-KNIL") had 389 planes at its disposal. Nevertheless, despite these efforts, in the three months following Pearl Harbor the Dutch East Indies (along with the rest of Southeast Asia) were overrun by the Japanese. After the Battle of the Java Sea, most naval assets were lost and the Dutch East Indies surrendered on March 8, 1942.

However, some personnel, especially aviators, managed to reach Australia. Later, three joint Australian-NEI squadrons were formed. The first of these, No. 18 (NEI) Squadron RAAF, was formed in April 1942 as a medium bomber squadron equipped with B-25 Mitchell aircraft. The second joint Australian-NEI squadron, No. 119 (NEI) Squadron RAAF, was also to be a medium bomber squadron. No. 119 NEI Squadron was only active between September and December 1943 when it was disbanded to form No. 120 (NEI) Squadron RAAF which was a fighter squadron, equipped with P-40 Kittyhawks. Both No. 18 and No. 120 Squadrons saw action against the Japanese (and against Indonesian nationalists during the Indonesian National Revolution, before being disbanded in 1950).

Some Dutch ships were also based in Australia and Ceylon, and continued to operate in the Indian and Pacific oceans. Due to the high number of submarines present in the Netherlands East Indies (the major part of the defensive plans of the Dutch government), the Dutch were called, in the Asian Campaign, the Fourth Ally. The total number of submarines operating in the Eastern Theater was seventeen.

During the Borneo campaign of 1945, some Dutch army units including some from the Dutch West Indies and Dutch Guyana were attached to Australian Army units operating in the Dutch portion of Borneo.

West Indies

Dutch military exercises on Curacao Dutch military exercises on Curacao during World War II.jpg
Dutch military exercises on Curaçao

The Netherlands' colonial possessions in the Caribbean comprised the islands of Aruba, Bonaire, Curaçao, Saba, Sint Eustatius and Sint Maarten, and these together with Surinam, made up the Netherlands West Indies.

Aruba was of significant strategic importance as it housed the largest oil terminal in the Caribbean, from which much of Britain's oil was shipped. Oil from Venezuela was taken by coastal tankers to Aruba where it was stored in large tanks awaiting transshipment to oceangoing vessels. These facilities were vulnerable to German attack but as the UK could spare no resources to help protect them, their defense fell to the Netherlands West Indies Defense Force. This Territorial force possessed only small arms, a handful of obsolete 8 cm. naval guns and a few small coastal patrol boats. In the summer of 1940 it was felt that the U-boat threat to the oil terminal and shipping lanes necessitated air cover and so an air support unit was created using a Fokker F.XVIII converted for maritime patrol duties.

In fact, the only military action in the area occurred in February 1942 when the Defense Force's Fokker together with a US aircraft attacked two U-boats off Aruba which had sunk a number of allied oilers. From the summer of 1942 onwards, air cover for the area was provided by US aircraft.

Liberation

People celebrating the liberation of The Hague on 8 May 1945 BC856 HUI-1699.jpg
People celebrating the liberation of The Hague on 8 May 1945

The first Allied troops entered the Netherlands on September 9, 1944, on a reconnaissance patrol; on September 12, 1944, a small part of Limburg was liberated by the US 30th Infantry Division. During Operation Market Garden, the Americans and British established a corridor to Nijmegen, but they failed to secure a Rhine crossing at Arnhem.

During the rest of 1944, the Canadian First Army liberated Zeeland in the Schelde Campaign, in order to free access to the harbour of Antwerp. By 1945, the entire southern part of the Netherlands (up to the Waal and Maas rivers) had been liberated. [27]

After Operation Veritable, the Allied advance from the Germany–Netherlands border into the Rhineland, and the crossing of the Rhine at Wesel and Rees in Operation Plunder, the Canadian First Army liberated the eastern and northern parts of the Netherlands, resulting in fights such as the battle of Groningen and the battle of Otterlo. However, they did not attack the German forces in the western part (ironically, they stopped at about where the Grebbe Line was in 1940), for fear of massive civilian casualties: the western part of the Netherlands (also called the Randstad) is one of the most densely populated areas in the world. The civilian population there, still suffering from the effects of the Hongerwinter ('Hungerwinter'), was now cut off from food that was available in the rest of the Netherlands. However, the Germans, having agreed to a truce, did allow the staging of an Allied relief effort, Operations Manna (RAF) and Chowhound (USAAF). The German forces in the Netherlands finally surrendered in Wageningen, on May 5, 1945. The acts of Canadian soldiers toward the civilian population during this period would be a major point of endearment and friendship in Canada–Netherlands relations, among other acts throughout the war, for many years afterward.

See also

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References

  1. De Jong (1969b), p. 351
  2. De Jong (1969), p. 562
  3. 1 2 De Jong (1969b), p. 325
  4. Schulten (1979), p. 24
  5. Schulten (1979), pp. 33–37
  6. Schulten (1979), pp. 38–40
  7. Schulten (1979), pp. 40–41
  8. De Jong (1969b), p. 331
  9. De Jong (1969), p. 545
  10. De Jong (1969b), p. 332
  11. 1 2 De Jong (1969b), p. 327
  12. Nederlandse Vuurwapens: Landmacht en Luchtvaartafdeling, drs G. de Vries & drs B.J. Martens, p.40-56
  13. De Jong (1969b), p. 330
  14. De Jong (1969b), p. 337
  15. Niels Hillebrand (15 May 2004). "Royal Netherlands Air Force, 1939–1945 Second World War". www.milavia.net. Retrieved 25 March 2010.
  16. De Jong (1969b), p. 338
  17. De Jong (1969b), p. 340
  18. De Jong (1969), p. 544
  19. Amersfoort (2005), p. 71
  20. De Jong (1969b), p. 344
  21. Amersfoort (2005), p. 82
  22. De Jong (1969b), p. 349
  23. De Jong (1969b), p. 329
  24. De Jong (1969b), p. 346
  25. De Jong (1969), p. 577
  26. Mark Zuehlke, On to Victory: The Canadian Liberation of the Netherlands, March 23 – May 5, 1945 (D & M Publishers, 2010.)

Further reading