We need to do everything we can to stop that from happening. If we let them then they will divide our forces in two. We must not let them take control of Vicksburg or the Mississippi River.
We must capture Vicksburg. That is the key of winning this war and finally defeating the South.
The Union successfully made the blockade of the Mississippi River and took Vicksburg. The Confederate States surrendered.
Oh NOOOO!! We lost!! But how did you manage to win?
That's easy. First of all we had a bigger and better army and more supplies. Our troops were well equipped and ready for battle, your troops were ill and weak. We also successfully fortified Vicksburg and blockade the Mississippi River.