sentences:  Following the March to the Sea, Sherman turned North through South Carolina and North Carolina to approach the Lee's army from the south.During the Valley Campaigns of 1864, Confederate general Jubal Early crossed the Potomac River, and advanced into Maryland.On July 11, two days after defeating Union forces under General Lew Wallace in the Battle of Monocacy, Early attacked Fort Stevens, an outpost on the defensive perimeter of Washington.