Abaddon, from a Hebrew word meaning Destroyer, was king of the locusts which rose at the sounding of the fifth trumpet as described in the Book of Revelation at the end of the ChristianBible. Apollyon is his Greek name, and both names have been used often in works of popular culture, where he is frequently conflated with Satan.
At the Battle of Verdun, Abaddon took several forms, including those of Adolf Hitler and Joseph Stalin, before he was machine-gunned to death by both French and German troops, each believing Abaddon to belong to the other side.