The U.S. employed multiple strategies:
Cold War policy to halt communism's spread via political, economic, military means.
Negotiations, UN engagement, talks with adversarial leaders.
Trade restrictions to weaken aggressive regimes' war capacity.
Aid to allies or direct action to counter expansion.
Condemned abuses, supported international protections.
NATO, regional pacts to collectively deter aggression.
Encouraged democracy, governance, economic liberalization as alternatives.
Responses varied by administration, context, and specific regime.