The French gave up their colonies west of the Mississippi and Canada to Britain, and they gave New Orleans to Spain. Christopher Columbus.
Wave after wave of Germanic barbarian tribes swept through the Roman Empire. ... Romulus, the last of the Roman emperors in the west, was overthrown by the Germanic leader Odoacer, who became the first Barbarian to rule in Rome. The order that the Roman Empire had brought to western Europe for 1000 years was no more.
The oldest traces of Americans were some ancient humans from Asia. which was 13000 years old!!! The work is important because its been 13000 years old and it shows "real" people, not just skeletal remains or artifacts.
(you could always research these kinds of question just don't copy and paste everything)
This is kind of vague but a historian might say that it was or was not necessary, that it killed thousands, that it was costly, and that it divided the country.