 Complete the following phrase:  The fiercest fighting of the battleand the second bloodiest day of the Civil Waroccurred on May 3 as Lee launched multiple attacks against the Union position at Chancellorsville. That same day, John Sedgwick advanced across the Rappahannock River, defeated the small Confederate force at Maryes Heights in the Second Battle of Fredericksburg, and then moved to the west. The Confederates fought a successful delaying action at the 