World War II was a conflict like no other. Allies and Axis powers clashed for six years, millions of people lost their lives, and the world was never the same afterward. To this day, there are still many unanswered questions about this terrible time in history, including unsolved mysteries that took place during and after the war.
From people vanishing to treasures yet to be found, in this gallery we look at the greatest unsolved mysteries of World War II. Click through to learn more.