The battle in Moscow is in full swing when Stalin suddenly receives a important piece of news. On december 7th, 1941, Pearl Harbor, the american naval base in the Pacific, is attacked by Japan, Germany's ally. Franklin Roosevelt, president of the United States, announces that his country is entering the war. Stalin has a new ally. In august 1942, Stalin receives some reinsurance when Winston Churchill, the english prime minister, lands in Moscow with his personnal plane. His travelling companion plane is an american special envoy, a powerful businessman, who coordinates allies aid.