World War II began in Europe on September 1, 1939, when Germany invaded Poland. Great Britain and France responded by declaring war on Germany on September 3. The war between the U.S.S.R. and Germany began on June 22, 1941, with Operation Barbarossa, the German invasion of the Soviet Union.

What country started World War 2?

On September 1, 1939, Hitler invaded Poland from the west; two days later, France and Britain declared war on Germany, beginning World War II. On September 17, Soviet troops invaded Poland from the east.

What year was World War 3?

World War III (often abbreviated to WWIII or WW3), also known as the Third World War or the ACMF/NATO War, was a global war that lasted from October 28, 2026, to November 2, 2032. A majority of nations, including most of the world's great powers, fought on two sides consisting of military alliances.