Three Confederate forces converge on the Federal garrison at Harpers Ferry, at the strategic confluence of the Potomac and Shenandoah rivers.
Thomas “Stonewall” Jackson’s Confederates advance toward Culpeper Court House and confront a Federal force deployed to stop them at Cedar Mountain in northern Virginia.
John Pope sends his Federal army probing southward from northern Virginia, while Robert E. Lee determines that Pope is the main threat to his Confederate army.
Robert E. Lee makes another attempt to destroy the Federal Army of the Potomac on the Virginia Peninsula, this time attacking at Glendale, Frayser’s Farm, and White Oak Swamp.
Robert E. Lee launches another attack on the Federal right flank outside Richmond, which forces George B. McClellan to begin planning to withdraw southward to the James River.
Robert E. Lee launches his planned assault on the right flank of the Federal Army of the Potomac outside Richmond, but it does not go as he hoped.