The American experience in Vietnam defined a generation, spurring civil unrest and the degradation of trust in important political and military institutions. Spanning the course of two decades, the United States’ engagement in the conflict reflected the heightened global tension of the Cold War. American involvement in Vietnam began as early as 1950, initially in the form of assistance to the French during the First Indochina War. By the end of the Kennedy administration, the United States had begun to send American advisers and military forces to Vietnam, aiming to prevent the spread of communism to Southeast Asia.