Union troops, turned back at Chinn Ridge, begin to withdraw toward Centreville.

Union troops, turned back at Chinn Ridge and failing to take Henry House Hill, begin to withdraw toward Centreville during the First Battle of Manassas. Soon, the retreat becomes a rout, with many of Irvin McDowell’s men rushing pell-mell back to Centreville. McDowell determines the army must return to Washington, D.C.