In November 1952, Dwight Eisenhower was elected president of the US after a campaign promising a more hawkish stance against communism. Many senior figures in his cabinet, including John Foster Dulles and his brother Allen, had close connections to the United Fruit Company, which made Eisenhower more strongly predisposed than Truman to support Árbenz's overthrow. In June 1954, the US-trained and funded an invasion force led by Castillo Armas, backed by an intense campaign of psychological warfare by the CIA. Gálvez, Somoza, Jiménez, and Trujillo again offered the CIA their support in preparing for this operation. Árbenz resigned on June 27, 1954, ending the Guatemalan Revolution. Following his resignation, the CIA launched Operation PBHistory, an attempt to use documents from Árbenz's government and elsewhere to justify the coup in response to the negative international reactions to it.