The growth of civilization most clearly traced is farming
I think you've missed a word; do you mean: explain why do presidents think that military is important.
Military is important for security, and without the military a country can't defend itself: see the attack on Pearl Harbor.
With a strong army the president has more power and cannot be threatened by other countries.
Saigon was renamed H0 Chi Minh city
Answer:
Black people were brought to the Americas as slaves against their will, mainly to work on farms and plantations. The vast amounts of crops that farmers planted needed people to work them, and others were too expensive to hire.
Explanation:
Most African Americans were brought to the Americas as children, which were smuggled from their home and shipped through the middle passage. Some people freed these African Americans after they died, but life was hard for people of color, as they would often be brought back into slavery after having nowhere to work.