President Roosevelt saw support from the Allies involved in World War II
increase due to his strong victory during the 1940 Presidential
election, where he easily defeated Wendell Willkie
The cause is that he forgot his math book
the effect this had was that he couldn't do the homework
This policy was called "containment" - the idea was to contain communism from spreading to new countries without trying to actively challenge the communist system in the countries that already had it.
This policy lead to some proxy wars, in which the US fought the Soviet Union for the free countries.
C they were devastated by european diseases.
