— Ch. 1 · Strategic Context And Setup —
Battle of Seven Pines.
~6 min read · Ch. 1 of 7
On the 31st of May 1862, the Union Army of the Potomac stood within a few miles of Richmond, Virginia. General George B. McClellan had pushed his 105,000-man force up the Virginia Peninsula after withdrawing Confederate forces from Drewry's Bluff. The Chickahominy River flowed between the two armies, creating a natural barrier that turned the land east of Richmond into swamps during the spring rains. McClellan positioned three corps north of the river to protect railroad supply lines while leaving two corps south of the water. This arrangement left the IV Corps under Brigadier General Erasmus D. Keyes isolated and forward, only one mile west of Seven Pines. Johnston's defensive line stretched counterclockwise from James River to the Chickahominy, but he knew a massive siege would destroy his army. He planned to strike the two southern corps before Irvin McDowell's I Corps could arrive from Fredericksburg. By late May, the Confederates had burned most bridges over the Chickahominy and settled into strong positions north and east of the city. McClellan believed faulty intelligence showed the Confederates outnumbered him significantly, so he moved slowly and deliberately toward the capital.
Confederate Attack Plan Flaws
Joseph E. Johnston issued oral orders to Longstreet in a long meeting on May 30, while other generals received vague written instructions. The plan called for A.P. Hill and Magruder to distract Union forces north of the river while Longstreet attacked Keyes from three directions at Seven Pines. On the morning of May 31, Longstreet marched down the Charles City Road and turned onto the Williamsburg Road instead of the Nine Mile Road. Huger's division did not receive a specific start time and remained asleep until hearing nearby marching. Five hours after the scheduled attack began, D.H. Hill sent his brigades forward against Casey's division alone. Johnston and Smith waited at headquarters unaware that fighting had started until 4 p.m. An acoustic shadow prevented them from hearing cannon fire despite being only miles away. Longstreet either misunderstood his orders or modified them without telling Johnston. His column joined Hill's on the Williamsburg Road, limiting the attack to a narrow front with only a fraction of total force. A severe thunderstorm on the night of May 30 flooded the river and turned roads into mud, further complicating movement. These mismanagement issues meant Confederate forces could not concentrate their full strength where it mattered most.