Franklin Roosevelt
The united states of America
The leader of Russia during the First World War was Czar Nicholas II. He was killed on July 17, 1918.
Germany's leader during the First World War was Kaiser Wilhelm the Second. He abdicated after the November Eleventh armistace.
There was no single leader during WW1. Each country had their own leader.
2 years
The first president of South Korea, and leader of that nation during the Korean War.
Joseph Stalin was the leader of the Soviet Union during World War II.
The leader of the SS during WW2 was Heinrich Himmler .
I believe you are asking what started World War I and that would be the assassination of the Austria-Hungary leader
The first recorded landing of Europeans in South America was in 1498. During the third expedition of Columbus to the New World, he landed in South America.
America was in debt during the Manhattan project. The Manhattan project was led by the United States and produced the first atomic bombs during World War II.