Florida from Spain & part of the Oregon territory from Britain
Answer:
Neolithic Revolution??
because It changed the way people lived drastically and was truly revolutionary.
The number one cause of the American Civil War is the issue of slavery.
The reason why president Abraham Lincoln want reconstruction to be simple and easy is :
D. he believed that the southern states had never left the union and therefore there was no need to go through a lengthy process t make them part of the united states again
(he was really mad at them back then)
hope this helps