World War II (abbreviated WWII), or the Second World War, 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 with an Allied victory.

A large number of major league players joined the military during the conflict. Some of the more notable players include:

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