The Battle of Fair Oaks or Battle of Seven Pines, Virginia, was a two days engagement in the Peninsular campaign of the American Civil War, on May the 31st and June the 1st 1862, between the Confederates, numbering about 35,000 men under Edward Johnston, and a detachment of some 11,000 troops of McClellan's army under Casey. That leader had been sent across the Chickahominy River, and was accordingly isolated from the main army. Edward Johnston decided to attack him. He therefore sent Hill and James Longstreet against Casey's left flank and Gustavus Smith against his right. Casey was overwhelmed, and retreated to Couch's position at Seven Pines, where the latter was fiercely defending himself and waiting for reinforcements from Heintzelman. The Confederates were forcing their way down along the Chickahominy to Bottom's Bridge, when they were intercepted by Sumner's batteries and routed with great slaughter. Research Battle of Fair Oaks