The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during World War II (1939–1945) to oppose the Axis powers. Its principal members by the end of 1941 were the "Big Four" – United Kingdom, United States, Soviet Union, and China.
The Allied leaders of the European theatre (left to right): Joseph Stalin, Franklin D. Roosevelt and Winston Churchill meeting at the Tehran Conference in 1943
The Allied leaders of the Asian and Pacific Theater: Generalissimo Chiang Kai-shek, Franklin D. Roosevelt, and Winston Churchill meeting at the Cairo Conference in 1943
French postcard illustrating the alliance between Poland, France and the United Kingdom (1939)
"Long live the victory of the Anglo-Soviet-American military alliance!" – USSR stamp of 1943, quoting Stalin
The Kingdom of Yugoslavia was a country in Southeast and Central Europe that existed from 1918 until 1941. From 1918 to 1929, it was officially called the Kingdom of Serbs, Croats, and Slovenes, but the term "Yugoslavia" was its colloquial name due to its origins. The official name of the state was changed to "Kingdom of Yugoslavia" by King Alexander I on 3 October 1929.
Celebrations in Zagreb during the formation of the National Council of the State of Slovenes, Croats and Serbs, October 1918
Serbian Army in Zagreb's Ban Jelačić Square in 1918
Delegation of the National Council of the State of Slovenes, Croats and Serbs led by Ante Pavelić reading the address in front of regent Alexander, 1 December 1918
Mihajlo Pupin, Serbian physicist and physical chemist. He influenced the final decisions of the Paris Peace Conference when the borders of the Kingdom were drawn.