Otto the Great established the first great kingdom after the fall of the roman empire
The word “imperialism” is widely used as an emotive—and more rarely
as a theoretical—term to denote specific forms of aggressive behavior on
the part of certain states against others; the concept refers primarily
to attempts to establish or retain formal sovereignty over subordinate
political societies, but it is also often equated with the exercise of any form of political control or influence by one political community over another.
hope this helps :)
A. Requiring all of his subjects to become Buddhists.
The crusades Greatly affected the feudal system and began to lose it hold on society which eventually led to the Renaissance. Knights had to sell their land to be able to live, due to the feudal system crashing. So if they were not able to make enough by selling their land, they were left broke. They were also forced to serve nobles in personal armies.
The United States of America joined World War II when Pearl Harbor was bombed...if you're referring to the 2nd World War.