Explanation:
C Between the Tigris and Euphrates rivers
The crusades from Europe believed that Jerusalem (the holy land) was theirs, while the Middle Eastern countries disagreed, leading to battles and attacks in the northern part of Jerusalem.
They could only be readmitted if they ratified the 13th, 14th &15th Amendments. These amendments first abolished slavery, prohibited depriving any male equal protection under the law, & gave African Americans the right to vote.