In what year did the number of US troops in
Vietnam reach 385,000 for the first time?

1966

Explanation:

Part 2 of the question: As time went on, the number of troops in Vietnam...

increased

(For Edge people!)

remember the people who sacrificed their lives at gettysburg

mark me brainiest

your answer is 1930's

explanation

this is just around the time the great depression was starting and putting the us ecnomy into ecnomic failure causing the goverment to take a much larger rule to try and pieace it back together