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Lyndon B. Johnson
- Began an invasion of the Dominican Republic, transforming evacuation operations into a full-scale military intervention out of fears of a communist government in the DR. The "lists of communists" provided contained people who weren't communists or were already dead. Joaquín Balaguer, the US-backed president of the Dominican Republic, would go on to kill or disappear thousands of people.
- Through the Gulf of Tonkin Resolution, Johnson severely expanded the American involvement in the Second Indochina War, with troop numbers increasing by 8 times. The American involvement would leave millions of civilians dead.
- Continued spying on Martin Luther King Jr. and confidants of the candidate opposing his party in the next election, Richard Nixon.