The main countries in the Allied powers of World War II were the Soviet Union, the United Kingdom, France and the United States. There were several other countries that fought alongside the Allied Powers, but these countries were the major belligerents and provided the vast majority of Allied troops.Continue Reading
The United Kingdom and France first declared war on Germany on Sept. 1, 1939, after Hitler's invasion of Poland. Despite repeated warnings that Germany's actions were in violation of the Treaty of Versailles, Germany continued expanding its territory until the United Kingdom and France declared war. In 1940, Germany's assaults removed France from the major conflict.
Meanwhile, Germany and the Soviet Union had come to an agreement known as the Molotov-Ribbentrop Pact, which stated that neither side would attack the other and the countries would divide Poland between them. Germany broke this agreement in June of 1941, causing the Soviet Union to side with the Allies.
During this time, the United States had maintained an attitude of neutrality. The Japanese Empire was expanding its holdings in the Pacific and wanted to keep the United States from being able to stop it. Therefore, the Japanese military launched an attack on Pearl Harbor on Dec. 7, 1941. On December 8, the United States entered the war in response on the side of the Allies.Learn more about World War 1
The alliance of World War I Allied Powers was formed by France entering into a military alliance with Russia, and then bringing Great Britain into the pact between the three countries called The Triple Entente in 1908. The United States joined forces with the Allies in the spring of 1918.Full Answer >
The Triple Entente was an alliance between Russia, the United Kingdom and France in the years leading up to World War I. It was made official after the U.K. and Russia signed the Anglo-Russian Entente on August 31, 1907 and lasted until Russia withdrew from World War I in 1917.Full Answer >
During World War I, Germany, Austria and the other countries in the Ottoman Empire formed the Central Powers and fought against the Allied Powers, which consisted of Russia, Japan, Great Britain, Italy and France. The war began following the unexpected assassination of Austria's Archduke Ferdinand.Full Answer >
The majority of Americans felt that the United States should stay out of World War I because it was not a signatory to any of the agreements that had lured the European powers into conflict across the continent, so President Woodrow Wilson declared a neutrality policy, attempting instead to broker a peace agreement. Even when a German sub sank the British ocean liner Lusitania in 1915, with 128 Americans on board, the United States demanded a stop to the destruction of passenger ships, and Germany agreed, leading to continued American neutrality.Full Answer >