Answer:
WWI:
The sinking of the Lusitania by a German U-boat in 1915 and the Zimmerman Telegram that attempted to incite a Mexican invasion of the USA. These two things convinced the American public of the need to enter the war and allowed president W.Wilson to do it.
WWII:
The USA remained neutral for two years, but the surprise Japanese attack on Pearl Harbor of December 7, 1941, outraged the public. Congress authorized president FDR to declare war on Japan.
Korea:
It was already the Cold War. Washington thought that the invasion of South Korea by North Korea in 1950 was an elaborated plan to expand communist and it reacted to oppose and impede it. It was the rationale of containment.
Vietnam:
Same reason as in Korea: to stop communist aggression and expansion in Asia, following the containment doctrine.
Explanation:
Answer:
a. They were considered unwelcome
Explanation:
Slavery among Native Americans in the United States<span> includes slavery </span>by<span> Native Americans as well as slavery </span>of<span> Native Americans roughly within the present-day United States. Tribal territories and the slave trade ranged over present-day borders. Some </span>Native American tribes<span> held war captives as slaves prior to and during </span>European colonization<span>, some Native Americans were captured and sold by others into slavery to Europeans, and a small number of tribes, in the late eighteenth and nineteenth centuries, adopted the practice of holding slaves as </span>chattel<span> property and held increasing numbers of </span>African-American<span> slaves.</span>
B......... there's not much information to go on
