, United States (USA) (American Colonies)
1965 - Vietnam War - First U.S. ground combat forces arrive in South Vietnam

The arrival of U.S. ground combat forces in South Vietnam in 1965 marked a significant escalation of American involvement in the conflict. Prior to this, the U.S. had been providing military advisors and assistance to the South Vietnamese government in its fight against the communist insurgency and the North Vietnamese forces.

The decision to send combat troops was influenced by the deteriorating situation in South Vietnam, where the Viet Cong, supported by North Vietnam, were gaining ground. The U.S. believed that direct military intervention was necessary to prevent the collapse of the South Vietnamese government and to contain the spread of communism in Southeast Asia.

The first U.S. combat troops to arrive were part of the 9th Marine Expeditionary Brigade, which landed in Da Nang on March 8, 1965. This deployment marked the beginning of a major escalation of U.S. involvement in the conflict, which would eventually see hundreds of thousands of American troops deployed to Vietnam.

The escalation of the war sparked widespread protest and opposition in the United States, leading to a deeply divisive and controversial period in American history. The Vietnam War would ultimately last for another decade, ending in 1975 with the fall of Saigon and the reunification of Vietnam under communist rule.

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