With much of Europe under Nazi control, the Russians faced a daunting German invasion in June 1941. By December, the United States would be compelled to enter the war. The question at this time became- could the Allies unify their efforts?
The Tehran Conference of 1943 represented the greatest concentration of power the world had ever seen. There, allied forces finalized plans for Operation Overlord. By early 1945, the Allies met in Yalta to discuss the future of the world.