Which event prompted US intervention in Latin America during the cold war era

1. Soviet sponsored revolution in Brazil

2. British claims to the Falkland Islands

3. A popular uprising in Mexico

4. Allende's rise in Chile

The event that prompted US intervention in Latin America during the cold war era was: 4. Allende's rise in Chile

Salvador Allende came from a socialist party. United States believed that if Allende managed to gain power in the government, Chile will became an ally of Soviet Union, so United States decided to intervene the process.