 Complete the following phrase:  Early got off to a good start. He drove down the Valley without opposition, bypassed Harpers Ferry, crossed the Potomac River, and advanced into Maryland. Grant dispatched a corps under Maj. Gen. Horatio G. Wright and other troops under Crook to reinforce Washington and pursue Early. Early defeated a smaller force under Maj. Gen. Lew Wallace in the Battle of Monocacy on July 9, but this battle delayed his progress enough to allow time for the reinforcement of the defenses of Washington. Early attempted some tentative attacks against 