In which year did WW2 begin?
World War II (WWII or WW2), also known as the Second World War, was a global military conflict that officially lasted from 1939 to 1945 (but some important conflicts related to the war took place even earlier).
The start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland and the declaration of war on Germany by Britain and France.
The final battles of the WWII took place in early May 1945. The German Instrument of Surrender was signed on the 7th of May, 1945. The German surrender finally put an end to this murderous and prolonged war, which is considered to be the deadliest in history. The estimated number of deaths varies from 60 to more than 80 million people.