How the modern world was forged -- World War II was a worldwide conflict fought between the Allied Powers and the Axis Powers, from 1939 until 1945. Armed forces from over seventy nations engaged in aerial, naval, and ground-based combat. Spanning much of the globe, World War II resulted in the deaths of over sixty million people, making it the deadliest conflict in human history. The war ended in 1945 with an Allied victory. Source: wikipedia