Answer :
Final answer:
NATO and the Truman Doctrine aimed to contain Soviet influence and defend Western Europe during the Cold War by ensuring collective security and providing military aid.
Explanation:
The initial purpose of the North Atlantic Treaty Organization (NATO) and the Truman Doctrine was to contain the spread of Soviet influence and defend Western Europe against Soviet aggression during the Cold War.
NATO, formed in 1949, ensured collective security among its members, where an attack on one was considered an attack on all, deterring potential threats.
The Truman Doctrine provided military aid to countries under Communist threat, emphasizing a policy of containment to prevent the spread of communism.
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