Sumter in 1861, U.S. Army General-in-Chief Winfield Scott proposed to President Abraham Lincoln a plan to bring the states back into the Union: Cut the Confederacy off from the rest of the world instead of attacking its army in Virginia. His Anaconda Plan was to blockade or occupy the Confederacy's coastline to limit the activity of blockade runners, and control the Mississippi River valley with gunboats. In cooperation with the Navy, troops from Fort Monroe extended Union control along the coasts of the Carolinas as Lincoln ordered a blockade of the southern seaboard from the South Carolina line to the Rio Grande on April 19 and, on April 27, extended it to include the North Carolina and Virginia coasts. On April 20 the Union Navy burned and evacuated the Gosport Navy Yard in Portsmouth, destroying nine ships in the process, keeping Fort Monroe at Old Point Comfort as the last bastion of the United States in Tidewater Virginia. The Confederacy's occupation of Norfolk gave it a major shipyard and thousands of heavy guns, but they held it for only one year. Confederate Brigadier General Walter Gwynn, who commanded the Confederate defenses around Norfolk, erected batteries at Sewell's Point, to protect Norfolk and to control Hampton Roads. The Union dispatched a fleet to Hampton Roads to enforce the blockade. On May 18–19, 1861, Federal gunboats based at Fort Monroe exchanged fire with the Confederate batteries at Sewell's Point. The little-known Battle of Sewell's Point resulted in minor damage to both sides. Several land operations against Confederate forces were mounted from the fort, notably the Battle of Big Bethel in June 1861. On May 27, 1861, Major General Benjamin Butler made his famous "contraband" decision, or "Fort Monroe Doctrine", determining that the enslaved men who reached Union lines would be considered "contraband of war" (captured enemy property) and not be returned to bondage. Prior to this, the Union had generally enforced the Fugitive Slave Act, returning escaped slaves to their owners. The order resulted in thousands of slaves fleeing to Union lines around Fort Monroe, which was Butler's headquarters in Virginia. Fort Monroe became called "Freedom's Fortress", as any self-emancipating person reaching it would be free. In the Summer of 1861 Harry Jarvis made his way to Fort Monroe and insisted General Butler let him enlist. Butler refused because he believed "it wasn't a black man's war." Jarvis replied, "It would be