Allied and Axis Powers

• Germany
• Italy
• Japan

Countries that were seized by, or at war with, Axis Powers before World War II

• Austria
• Ethiopia
• Republic of China

Source:  "World War 2 Countries."  World War 2. World-War-2.info, 2011.  Web. 20 Apr 2011. <http://www.world-war-2.info/countries/>

Countries that were attacked, occupied, or switched sides during the war (many declared neutrality before being assaulted).

• Algeria
• Albania (occupied by Italy April 7th 1939, by Germany September 26th 1943)
• Belgium (invaded by Germany May 10th 1940)
• Burma
• Czechoslovakia(1) (Bohemia and Moravia occupied by Germany March 15th 1939)
• Denmark (occupied by Germany April 9th 1940, Greenland occupied by USA April 9th 1941)
• Estonia (occupied by the Soviet Union from June 18th 1940, by Germany September 5th 1941, re-annexed by the Soviet Union in 1944)
• Finland (attacked by the Soviet Union November 30th 1939 and June 26th 1941)
• France (surrendered to Germany June 22nd 1940)
• Greece (invaded by Italy October 28th 1940, German occupation from April 6th 1941)
• Iceland (occupied by Great Britain May 10th 1940, by USA from July 1941)
• India
• Iran
• Latvia (occupied by the Soviet Union from June 18th 1940, by Germany June 25th 1941, re-annexed by the Soviet Union in 1944)
• Lithuania (occupied by the Soviet Union from June 18th 1940, by Germany June 22nd 1941, re-annexed by the Soviet Union in 1944)
• Luxembourg (invaded by Germany May 10th 1940)
• Morocco
• The Netherlands (invaded by Germany May 10th 1940)
• New Guinea
• Norway (invaded by Germany April 9th 1940)
• Philippines
• Poland (invaded by Germany and the Soviet Union in September 1939)
• Singapore
• Syria
• Thailand
• Tunisia (Occupied by USA in 1943)
• Yugoslavia(3) (German occupation from April 6th 1941)

Source:  "World War 2 Countries."  World War 2. World-War-2.info, 2011.  Web. 20 Apr 2011. <http://www.world-war-2.info/countries/>

Allied and Axis Powers 1939-1945

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Allied Powers

• Australia
• Brazil
• Canada
• Newfoundland
• New Zealand
• South Africa
• Soviet Union (from June 1941)
• United Kingdom
• United States (from December 1941)

Supporters of the Allies

• Argentina
• Bolivia
• Chile
• Colombia
• Costa Rica
• Cuba
• Dominican Republic
• Ecuador
• Egypt(2)
• El Salvador
• Guatemala
• Haiti
• Honduras
• Iraq
• Lebanon
• Liberia
• Mexico
• Mongolia
• Nicaragua
• Panama
• Paraguay
• Peru
• Saudi Arabia
• Turkey
• Uruguay
• Venezuela

Source:  "World War 2 Countries."  World War 2. World-War-2.info, 2011.  Web. 20 Apr 2011. <http://www.world-war-2.info/countries/>

Countries that remained neutral

• Ireland
• Portugal
• Spain
• Sweden (with exception for the Winter War)
• Switzerland

Source:  "World War 2 Countries."  World War 2. World-War-2.info, 2011.  Web. 20 Apr 2011. <http://www.world-war-2.info/countries/>