The union blockade of the south during the civil war was known as the. plan

The Union blockade of the Southern ports was part of General Scott's Anaconda Plan.

The Anaconda plan involved choking off the Southern supply of goods via a port blockage in tandem with the Union Army coming up, around, and down the Mississippi River and working through the south systemically.

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean