m https://en.wikipedia.org/wiki/World_War_II#/media/File:Infobox_collage_for_WWII.PNG
Top left: Battle of Wanjialing Top right: First Battle of El Alamein Middle left: Battle of Stalingrad Middle right: German dive bombers over Eastern Front winter 1943-1944 Bottom left: Wilhelm Keitel signing German Instrument of Surrender Bottom right: Invasion of Lingayen Gulf
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. The vast majority of the world's countries—including all of the great powers—eventually formed two opposing military alliances: the Allies and the Axis. It was the most global war in history; it directly involved more than 100 million people from over 30 countries. In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of which were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, starvation, disease, and the first use of nuclear weapons in history.
Fom https://en.wikipedia.org/wiki/World_War_IIa