USA HISTORY

Detailed explanation-1: -But which countries actually fought in the war? In fact, many nations were touched by the conflict, but the main combatants can be grouped into two opposing factions–Germany, Japan, and Italy where the Axis powers . France, Great Britain, the United States, and the Soviet Union were the Allied powers.

Detailed explanation-2: -In World War II, the three great Allied powers-Great Britain, the United States, and the Soviet Union-formed a Grand Alliance that was the key to victory. But the alliance partners did not share common political aims, and did not always agree on how the war should be fought.

Detailed explanation-3: -U.S.-Soviet Alliance, 1941–1945. Although relations between the Soviet Union and the United States had been strained in the years before World War II, the U.S.-Soviet alliance of 1941–1945 was marked by a great degree of cooperation and was essential to securing the defeat of Nazi Germany.

Detailed explanation-4: -The Soviet Union joined the Allies because Nazi Germany invaded the Soviet Union.

Detailed explanation-5: -At the start of World War II, Russia and Germany were friends. However, on 22 June 1941 Hitler, the leader of Germany, ordered a surprise attack on Russia. Russia then became an enemy of the Axis Powers and joined the Allies.