Anaconda Plan.
Step-by-step explanation:
The idea of attacking the Confederacy by squeezing them like a snake from the East and West is known as the Anaconda Plan.
The South was not industrialized during this time, they mostly relied on agriculture. The North was the opposite and was becoming more industrialized. This would make it easier for the North to cut off the South and prevent them from getting their supplies.
During the Civil War, the Union wanted to "constrict" the South and surround them with Union troops from the East and the West. The Union wanted to prevent the South from obtaining supplies from the Mississippi River, land, and by the ocean.