Question 1: Why did the Union want to control the Mississippi River?
The best answer choice is:
It would divide the Confederacy in two.
Controlling the Mississippi River would split the Confederacy, making it more difficult for Confederate states to communicate and supply each other.
Question 2: Why did many Native Americans support the Confederacy?
The best answer choice is:
They hoped to have greater freedoms under a Confederate government.
Many Native Americans believed that the Confederacy would recognize their rights and autonomy more than the Union did, and they were hopeful for a better deal regarding their lands and governance.