Largest battle yet in the eastern theater fought at Fair Oaks, Virginia near Richmond

The Army of Northern Virginia engaged the Union Army under General George B. McClellan threatening the Confederate capital of Richmond at Fair Oaks Station, Virginia in the largest battle yet fought in the East.  Fighting went on for two days and around a thousand men were killed on each side with thousands more wounded.  Among the wounded, crucially, was Johnston himself, who was replaced as army commander the day after the battle by General Robert E. Lee. (By John Osborne)