The connection between the Bay of Pigs invasion in April 1962 and the Khrushchev-Castro agreement in July 1962 can be described as follows:
The Bay of Pigs invasion, which took place in April 1961, was a failed attempt by the United States to overthrow the Cuban leader Fidel Castro. The invasion was supported by the U.S. government under President John F. Kennedy. However, the operation was unsuccessful, resulting in a major embarrassment for the U.S. and a strengthened resolve by Castro to defend his regime.
In response to the failed invasion, Fidel Castro sought greater military support from the Soviet Union. This led to secret negotiations between Soviet Premier Nikita Khrushchev and Castro, resulting in the agreement to install nuclear missiles on the island of Cuba. The Khrushchev-Castro agreement was seen as a way to deter future U.S. military interventions in Cuba and provide a strategic advantage to the Soviet Union during the Cold War.
Therefore, the connection between the Bay of Pigs invasion and the Khrushchev-Castro agreement lies in the fact that the failed invasion prompted Castro to seek Soviet support, ultimately leading to the installation of nuclear missiles in Cuba, which later escalated into the Cuban Missile Crisis in October 1962.