Final answer:
By the end of 1967, close to 500,000 American combat troops were stationed in Vietnam.
Step-by-step explanation:
By the end of 1967, the United States had stationed close to 500,000 troops in Vietnam. This was a significant increase from the more than 150,000 troops sent by the end of 1965. The escalation of troops was accompanied by an intensification of the antiwar movement, with protests against the war attracting tens of thousands of people. The growing opposition to the war reflected a divided national sentiment on the question of Vietnam.