After the attack on Fort Sumter in South Carolina, the Union developed an overall strategy to defeat the Confederates. Later dubbed "the Anaconda Plan," it required the Union to capture control of the Mississippi River, effectively splitting the Confederacy in two while blockading Southern ports to cripple the South's economy and prevent it from acquiring supplies.  This plan was derided at first because the blockade wasn't considered aggressive enough by Union generals, but it turned out to...