American Civil War - Tenth Legion 56th N.Y. Veteran Volunteers Recruitment Poster - Col. Van Wyck , black on white paper, some browning and edge damage Col.Van Wyck entered the Union Army as colonel of the 56th Regiment, New York Volunteers , and commanded it during the American Civil War. Part of the Army of the Potomac during the Peninsula Campaign, Van Wyck was wounded in the knee at the battle of Fair Oaks . Much of the war was then spent in South Carolina taking part in the Siege of Charleston Harbor and the battle of Honey Hill. He was brevetted brigadier general for services during the war. The Battle of Fair Oaks or Fair Oaks Station, took place on May 31 and June 1, 1862, in Henrico County, Virginia, as part of the Peninsula Campaign of the American Civil War. It was the culmination of an offensive up the Virginia Peninsula by Union Maj. Gen. George B. McClellan, in which the Army of the Potomac reached the outskirts of Richmond. On May 31, Confederate General Joseph E. Johnston attempted to overwhelm two Federal corps that appeared isolated south of the Chickahominy River. The Confederate assaults, although not well coordinated, succeeded in driving back the IV Corps and inflicting heavy casualties. Reinforcements arrived, and both sides fed more and more troops into the action. Supported by the III Corps and Maj. Gen. John Sedgwick's division of Maj. Gen. Edwin V. Sumner's II Corps (which crossed the rain-swollen river on Grapevine Bridge), the Federal position was finally stabilized. Gen. Johnston was seriously wounded during the action, and command of the Confederate army devolved temporarily to Maj. Gen. G.W. Smith. On June 1, the Confederates renewed their assaults against the Federals, who had brought up more reinforcements, but made little headway. Both sides claimed victory, although the battle was tactically inconclusive, it was the largest battle in the Eastern Theater up to that time (and second only to Shiloh in terms of casualties thus far, about 11,000 total) and marked the end of the Union offensive, leading to the Seven Days Battles and Union retreat in late June.