I choose World War II.
It was not just about armies fighting each other but also concerned the
decimation of an entire race of people.
During WWII, the Germans tried to
wipe out the Jews in Europe and almost succeeded had not the allies arrived and
liberated the camps where the Jews were held. This also led the establishment of international laws to prevent genocide and convict those who perpetuate it.
An empire is an aggregate of many separate states or territories under a supreme ruler or oligarchy.
And Rome or Italian Roma is a city in and the capital of Italy, in the central part, on the Tiber.
So basically, Rome is also an empire, you can call it the Roman Empire.
Answer:
United States v. Sioux Nation of Indians
Explanation: