Want this question answered?
United States
Woodrow Wilson
FDR
The United States leader for war conservation in World War 1 was President Herbert Hoover. When the United States entered into the war in 1917, Hoover wanted to conserved supplies and resources needed to feed America and for the war.
There was no one "world leader", but the two main competing nations were the United States and the Soviet Union.
The united states of America
Joseph Stalin was the leader of the Soviet Union when the United States entered World War 2.
United States
Joseph Stalin was the leader of the Soviet Union after World War II. While allies of Britain and the United States during the war, this was mainly because all considered Hitler to be their enemy. Directly, after the war, Britain and the United States ended their relationship with Stalin.
Economics
because of us participation and victory in wwii, after the war the us emerged as a superpower and world leader.
The united nations was created after world war 2