Political Stability: The US feared the spread of communism and other leftist ideologies in Latin America. They intervened to support friendly regimes and prevent the rise of governments hostile to US interests.
Influence over Policy: The US wanted to ensure that Latin American governments followed policies favorable to US interests. By intervening, they could influence the internal policies of these countries.
Protection of Citizens: The US had a large number of citizens living in Latin America, especially in countries with significant US economic interests. Interventions were sometimes justified as necessary to protect these citizens.
Strategic Concerns: The US saw Latin America as part of its sphere of influence, and intervening was viewed as a way to maintain regional hegemony.