The United States sent troops to Vietnam in the 1860s.

a. True

b. False

The United States sent troops to Vietnam in the 1860's is b) False. The United States entered the war in Vietnam on March 8, 1965. However, prior to this there had already been American activity on the ground, such as some naval movement, bombing of North Vietnam and military advisers on the ground in large numbers. By the middle of the year of 1965 direct combat had commenced.