This document provides background information on the presidencies of John F. Kennedy and Lyndon B. Johnson, including their policies regarding the Vietnam War. It discusses Kennedy's handling of events like the Bay of Pigs invasion and Cuban Missile Crisis. It also covers Johnson's "Great Society" domestic programs as well as the escalation of US involvement in Vietnam under his presidency. Key events like the Gulf of Tonkin Resolution and the growing US troop presence in Vietnam during this period are summarized.