Answer:
B
Explanation:
The disaster immediately strained relations between Germany and the neutral United States, fueled anti-German sentiment and set off a chain of events that eventually led to the United States entering World War I. Germany broke naval rules.
After the Soviet Union lost twenty million soldiers in WW2, Stalin wanted to make buffer zones around friendly states so they would never be invaded again.
despite services in the military African Americans returned to find that Jim crow's laws were still in place