Final answer:
The Eisenhower Doctrine called for U.S. assistance to help nations threatened with aggression by another country during the Cold War era.
Step-by-step explanation:
During the Cold War era, the nations threatened with aggression by another country were called the Eisenhower Doctrine. The doctrine was announced by President Dwight D. Eisenhower in 1957 and stated that the United States would provide military assistance to any Middle Eastern country threatened by communism. This policy was a response to the growing influence of the Soviet Union in the region and aimed to contain their expansion.
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