The First World War should be your answer
~ 20 million people died in WW1
hope this helps
<span>The Mongols invaded much of the known world in the early thirteenth century. They were destructive in their conquests, burning cities to the ground, destroying dams,</span>
There were 6 million Jews killed in World War II.
<span>C) provide economic aid to war-damaged Europe </span>
