Neutral powers during World War II

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  Allies after the attack on Pearl Harbor

The neutral powers were countries that remained neutral during World War II. Some of these countries had large colonies abroad or had great economic power. Spain had just been through its civil war, which ended on 1 April 1939 (five months prior to the Invasion of Poland)—a war that involved several countries that subsequently participated in World War II.

During World War II, the neutral powers took no official side, hoping to avoid attack. However, Portugal, Sweden, Colombia, and Switzerland all helped the Allies by supplying "voluntary" brigades[citation needed] to the United Kingdom, while Spain avoided the Allies in favor of the Axis. Ireland generally favoured the Allied side, as with the United States. The United States remained neutral until December 8, 1941, a day following the sneak attack by Japan on Pearl Harbor.

The Lateran Treaty between Italy and the Vatican, signed in 1929, required that the Pope maintain "perpetual neutrality in international relations"—making the Vatican City a neutral state.

Several countries suffered invasions in spite of their efforts to be neutral. These included Nazi Germany's invasion of Denmark and Norway on 9 April 1940—then Belgium, the Netherlands, and Luxembourg on 10 May 1940. On the same day, 10 May 1940, the British invaded Iceland and established an occupying force (subsequently replaced by the then-neutral United States). In the Baltic states, the Soviet Union invaded Lithuania on 15 June 1940 and Latvia and Estonia on 17 June. In the Balkans, the Italo-Greek War began on 28 October 1940 and Yugoslavia was invaded in April 1941. Iran was also attacked and occupied by Britain and the Soviet Union in August 1941.

See also the histories of Afghanistan, Andorra, Guatemala, Liechtenstein, Saudi Arabia and Yemen during this period.





  •  Portugal – Portugal was officially neutral during the World War II. However, it maintained a close relationship with the UK, due to the alliance it had for the last six hundred years, which is the longest lasting military alliance in history. The Estado Novo sought neutrality as a strategy to keep Spain neutral and prevent it from joining the Axis. Portugal continued trading with countries from both sides of the conflict throughout the war. In the second half of the war, it let the Allies use bases in the Azores to fight German submarines, because Prime Minister Salazar feared an Allied invasion of the Azores.

Colonies of Portugal:




  •   Switzerland – Switzerland maintained its neutrality so as to protect its own banking interests from plunder by the Axis. It also depended on German coal, with 10 million tons imported during the war, making up 41% of Swiss energy supplies. Often, Swiss soldiers opened fire on Axis bombers invading their airspace. On several occasions, Switzerland also shot down Allied planes. Throughout the war, cities in Switzerland were accidentally bombed by both Axis and Allied airplanes. Adolf Hitler did indeed plan to invade Switzerland, but Switzerland had formed complex fortifications and amassed hundreds of thousands of soldiers in the mountains to thwart any Axis invasion. Because of the extreme mountainous conditions in Switzerland, Hitler decided to bombard the United Kingdom rather than engage in a costly war with Switzerland.





  •  Monaco (occupied by Italy and later Germany)
San Marino[edit]
  •  San Marino (briefly occupied by Germany, 17–20 September 1944; declared war on Germany, 21 September 1944)
Vatican City[edit]



  •  Afghanistan remained neutral throughout World War II.



  •  Nepal remained neutral throughout World War II.

Saudi Arabia[edit]

  •  Saudi Arabia severed diplomatic contacts with Germany on 11 September 1939, and with Japan in October 1941. Although officially neutral, the Saudis provided the Allies with large supplies of oil. Diplomatic relations with the United States were established in 1943. King Abdul Aziz Al-Saud was a personal friend of Franklin D. Roosevelt. The Americans were then allowed to build an air force base near Dhahran.[4] Saudi Arabia declared war on Germany on 28 February 1945 and Japan on 1 April 1945, but no military actions resulted from the declaration.



  •  Turkey was neutral until several months before the end of the war, at which point it joined the Allies. Prior to the outbreak of war, Turkey signed a Mutual Aid Pact with France and Britain in 1939. After the German invasion of France, however, Turkey remained neutral, relying on a clause excusing them if military action might bring conflict with the USSR, which, after the division of Poland, Turkey feared. Then, in June 1941, after neighbouring Bulgaria joined the Axis and allowed Germany to move troops through to invade Yugoslavia and Greece, Turkey signed a treaty of friendship with Germany. Turkey was an important producer of chromite — a key ingredient in the manufacture of stainless steel and refractory brick — to which the Germans had limited access. Sale of chromite to Germany or to the Allies (who had access to other sources, and mainly bought Turkish chromite in order to preclude its sale to Germany) was the key issue in Turkey's negotiations with both sides. Turkey halted its sales to Germany in April 1944 and broke off relations in August. In February 1945, after the Allies made its invitation to the inaugural meeting of the United Nations (along with the invitations of several other nations) conditional on full belligerency, Turkey declared war on the Axis powers, but no Turkish troops ever saw combat.


  •  Yemen remained neutral throughout World War II



Portugal, Spain, Sweden and Switzerland held to the concept of armed neutrality, and continuously amassed soldiers to defend their nation's sovereignty from potential invasion. Thus, they maintained the right to become belligerent if attacked while in a state of neutrality. The concept of neutrality in war is narrowly defined and puts specific constraints on the neutral party in return for the internationally recognized right to remain neutral. A wider concept is that of non-belligerence. The basic treaty covering Neutral states is Convention V of The Hague Respecting the Rights and Duties of Neutral Powers and Persons in Case of War on Land (1907). It is important to note that a neutral country takes no side in a war between other parties, and in return hopes to avoid being attacked by either of them. A neutralist policy aims at neutrality in case of an armed conflict that could involve the party in question. A neutralist is an advocate of neutrality in international affairs. The concept of neutrality in conflicts is distinct from non-alignment, i.e., the willful desistance from military alliances in order to preserve neutrality in case of war, and perhaps with the hope of preventing a war altogether.

In a study of Spain, Switzerland and Sweden during WWII, Eric Golson found that they engaged in economic realpolitik, as they traded with both the Axis and the Allied Powers.[5]

See also[edit]


  1. ^ Liekis, Šarūnas (2010). 1939: The Year that Changed Everything in Lithuania's History. New York: Rodopi. pp. 119–122. ISBN 978-9042027626.
  2. ^ Neiburgs, Uldis. "Soviet occupation". Latvijas Okupācijas muzejs. Retrieved 17 December 2017.
  3. ^ Estonian Neutrality Law of December lst, 1938
  4. ^ Jan Romein (1962). The Asian Century: A History of Modern Nationalism in Asia. University of California Press. p. 382.
  5. ^ Golson, Eric (2016). "Neutrality in War". Economic History of Warfare and State Formation. Studies in Economic History. Springer, Singapore. pp. 259–278. doi:10.1007/978-981-10-1605-9_11. ISBN 9789811016042.

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