Arkansas. Before the battles of Fort Henry and Fort Donelson, Johnston had advocated improving the forts' structures as well as deploying additional troops and arms to more adequately defend them. The Confederate government failed to meet these recommendations. Ulysses S. Grant captured the forts in February 1862 and launched a full-scale invasion of Tennessee. The fall of these forts was inaccurately blamed on Johnston, but he continued to serve. In March 1862, Johnston organized the Army of Mississippi with P.G.T. Beauregard. He launched his attack at the Battle of Shiloh in April 1862. Johnston's plan was to drive the Union army from its landing point on the Tennessee River into the surrounding swamps. He assigned Beauregard to coordinate the attack. Beauregard disagreed with his strategy and instead planned to drive the enemy back toward the river. He in turn directed reconnaissance at this plan, resulting in the ultimate failure to pinpoint Grant's army. On the first day of battle, Johnston personally led the attack on the enemy. He was a victim of friendly fire, receiving a hit in the knee which severed his popliteal artery. Johnston died within an hour. His death resulted in critical reassignments of his command to less talented generals who failed to repair the virtually doomed Western Theater. Union capture of New Orleans (April 1862) Early in the war, Confederate strategists believed the primary threat to New Orleans would come from the north, and made their defensive preparations accordingly. As forces under Grant made gains in the Western Theater, much of the military equipment and manpower in the city's vicinity was sent up the Mississippi River in an attempt to stem the victorious Union tide. When Flag Officer David Farragut was able to force the Union Navy's West Gulf Blockading Squadron past the Confederacy's only two forts below the city in the Battle of Forts Jackson and St. Philip, New Orleans had no means to oppose capture. Thus the port, by far the largest Confederate city, fell undamaged into Union hands, tightening its grip on the Mississippi River and fulfilling a key element of the Anaconda Plan for the South's defeat. Although the occupation under Maj. Gen. Benjamin Butler was detested, he was astute enough to build a base of political support among the poorer classes and create an extensive intelligence and counterespionage capability, nullifying the threat of insurrection. The Confederacy's loss of its greatest port