World War II was the most destructive conflict in history. It cost more money, damaged more property, killed more people, and caused more far-reaching changes than any other war in history.
World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945.
It is estimated that 1.5 million children died during the Holocaust. Approximately 1.2 million of them were Jewish and tens of thousands were Gypsies.