Despite strong neutralist sentiments among members of Congress and the general public, Roosevelt
recognized that U.S. national security depended on Great Britain's survival.
In March 1941, he introduced the Lend-Lease Act in order
to supply Britain and her Allies with war material. Roosevelt oversaw the development
of military strategy and often conferred with British prime minister Winston Churchill.
Roosevelt and Churchill met with Soviet leader Joseph Stalin at Teheran in
1943 and Yalta in 1945. At these meetings, the leaders of the three principal allied nations not only
discussed wartime strategy, but also planned for the postwar order.
Many historians have criticized Roosevelt for being too trusting of Stalin, who established
Communist puppet states in Eastern Europe after the war.
Roosevelt died on
April 12th 1945, shortly before the end of the war, after he collapsed
from a cerebral hemorrhage. The same day in Washington, Harry Truman was sworn in as
During his term as Vice-President, Truman was rarely consulted by
Roosevelt. However, after he succeeded Roosevelt to the Presidency, he adapted quickly to the role and the heavy
responsibility. To avoid a bloody invasion of Japan and to
"scare" the Soviets, Truman was the one who made the decision
to use the atomic bomb on Japan, which subsequently ended war with Japan
and started another war: the Cold War.