In October 1936, King Leopold III announced that Belgium would remain neutral in the event of another war in Europe as part of what he termed an Independent Policy (Politique d'Indépendance).
[7] To this end, the Belgian government tried to steer a path away from alliances: leaving the Locarno Treaty, repudiating a defence pact with France signed in 1920[8] and receiving a guarantee of neutrality from Nazi Germany in 1937.
[11] On the declaration of war between the United Kingdom, France, and Germany in September 1939, the Belgian government launched a crash re-armament program, augmenting the national defenses by creating the K-W Line linking the National Redoubt at Antwerp with the south along the River Dijle, just behind the main Fortified Position of Liège.
At Eben-Emael, the fort held by 1,200 Belgians was taken when the Germans deployed 500 glider-borne Fallschirmjäger against them, opening the border for Blitzkrieg-style warfare.
On 28 May, forced into a small pocket along the Leie river and after failed attempts to broker a ceasefire on the 27th, the Belgian king and military surrendered unconditionally.
[citation needed] The king remained in Belgium during the war as a German prisoner while the government went into exile and continued military action in the Allied cause.
[31] Unlike the Netherlands and Luxembourg where the monarchy was repressed or had joined the government in exile, Leopold III remained prominent in the occupied territory, and coins and stamps produced during the occupation continued to carry his face or monogram.
"[33] While imprisoned, he sent a letter to Adolf Hitler in 1942 which has been credited with saving an estimated 500,000 Belgian women and children from forced deportation to munitions factories in Germany.
[30] After the war, allegations that Leopold's surrender had been an act of collaboration provoked a political crisis, known as the Royal Question, about whether he could return to the throne, which ultimately ended with his abdication.
[30] Belgium was run by a German military government under General Alexander von Falkenhausen and Eggert Reeder until July 1944, and then by Reichskommissar Josef Grohé until liberation.
In a raid on the Erla Motor Works in the Belgian town of Mortsel (near Antwerp) in April 1943, just two bombs dropped by the B-17s of the U.S. 8th Air Force fell on the intended target.
The most significant were DeVlag, Verdinaso and Vlaams Nationaal Verbond (VNV) in Flanders as well as the Catholic Rex movement in Wallonia.
In a 2007 report by a Belgian research institute, Cegesoma, a panel of historians concluded that Belgium had offered "maximum administrative collaboration" with the German occupation forces.
Léon Degrelle, founder of the Rexist Party, served as commander of the Walloon Legion, which fought against the Soviet Union in Eastern Europe.
A total of 15,000 Belgians[52] in the "divisions" (neither ever greater than brigade strength) fought on the Eastern Front where the Walloon Legion was nearly annihilated in the Korsun–Cherkassy Pocket in 1944.
[55] The Belgian government in exile dealt only with sympathetic resistance groups, like the Armée Secrète; however, even these umbrella organisations had many different agendas or political ideologies.
The activities of Groupe G, a small student resistance cell based in Brussels, alone are estimated to have cost the Nazis 10 million man-hours of labour to repair damages done.
[59] The resistance were instrumental in saving Jews and Roma from deportation to death camps, for instance the attack on the "Twentieth convoy" to Auschwitz.
[note 2] There was also significant low-level resistance, for instance in June 1941, the City Council of Brussels refused to distribute Stars of David badges.
[60] Certain high-profile members of the Belgian establishment, including Queen Elizabeth and Cardinal van Roey, Archbishop of Malines, spoke out against the German treatment of Jews.
[61] So far, 1,612 Belgians have been awarded the distinction of "Righteous Among the Nations" by the State of Israel for risking their lives to save Jews from persecution during the occupation.
[54] The former Belgian army fort at Breendonk, near Mechelen, was requisitioned by the Nazis and used for detainment and interrogation of Jews, political prisoners and captured members of the resistance.
[77] Belgians also served in British special forces units during the war, forming a troop of No.10 (Inter-Allied) Commando, which was involved in the Italian Campaign and the Landings on Walcheren.
[78] The 5th Special Air Service (part of the élite SAS) was made up entirely of Belgians and was the first Allied unit to enter Belgium in September 1944.
The Congo's gold alone contributed some $28.5 million to the Allied war effort,[89] while its exports of rubber and uranium provided vital sources of raw materials.
[95] Leopold III's brother, Charles, the Count of Flanders, was appointed Regent, pending a decision about whether the King would be able to regain his former position on the throne.
In 1949, Belgium joined the North Atlantic Treaty Organization and deployed troops to fight alongside other United Nations forces in the Korean War in 1950.
[2] From 1944 until 1960, Belgium also experienced a period of rapid economic recovery, dubbed the "Belgian Miracle", partially as a result of the Marshall Plan.
[note 3] There are numerous monuments and streets dedicated to Allied politicians and generals, including Franklin Roosevelt and Bernard Montgomery in Brussels.
[92] The large numbers of British and American cemeteries and memorials, particularly in the Ardennes region associated with the Battle of the Bulge, meant that the legacy of the war was very visible.