Union victories at vicksburg and port hudson

a. offset the loss at gettysburg.
b. cut the confederacy in two.
c. ensured that richmond would fall.
d. left the north at its lowest.

The main reason the us senate rejected the treaty of versailles was because, isolationists felt the us should not have gotten into the war. republicans had gained power in the senate. democrats had gained power in the senate. european nations wanted to punish germany.