Who did president Kennedy overthrow?

President John F. Kennedy did not personally overthrow any leaders, but he was involved in the U.S. government's covert operations aimed at overthrowing Fidel Castro in Cuba. The most notable operation was the failed Bay of Pigs invasion in April 1961, which sought to oust Castro's government but resulted in a significant defeat for U.S. forces. Kennedy's administration also engaged in various efforts to undermine Castro's regime during his presidency.