United States wanted to overthrow Fidel Castro because Cuba aligned itself with the Soviet Union. Castro's attacks on U.S. companies and interests in Cuba, his inflammatory anti-American rhetoric, and Cuba's movement toward a closer relationship with the Soviet Union led U.S. officials to conclude that the Cuban leader was a threat to U.S. interests in the Western Hemisphere. And In 1959, Fidel Castro came to power in an armed revolt that overthrew Cuban dictator Fulgencio Batista. The US government distrusted Castro and was wary of his relationship with Nikita Khrushchev, the leader of the Soviet Union.
The USA did not like Castro and refused to trade with Cuba, as a result Castro seized American assets in Cuba and made an alliance with the USSR. President Kennedy tried to overthrow Castro in April 1961. 1,400 Cuban rebels and exiles, with the support of the CIA, launched an invasion of Cuba at the Bay of Pigs.
The militia group that defeated Burgoyne troops at Bennington, Vermont was the "Green Mountain Boys"--although it should be noted that not all the people fighting in this group identified themselves as such.
Spiro Agnew was accused of taking bribes and forced to resign as Vice President of the United States. The charges stemmed from corrupt activity as a public official in Maryland.