The December 13, 1862, Battle of Fredericksburg, Virginia, marked the defeat of Union Maj. Gen. Ambrose Burnside’s Army of the Potomac by Confederate Gen. Robert E. Lee’s Army of Northern Virginia, an important setback for the Union cause and military effort to seize the Confederate capital city of Richmond, Virginia. The battle and military campaign preceding it, which occurred primarily along the Rappahannock River at the city of Fredericksburg and in adjacent Stafford and Spotsylvania counties, was the most lopsided victory the Army of Northern Virginia achieved during the American Civil War, with the Union Army sustaining combat casualties equivalent to more than double those suffered by Confederates. The campaign also saw the use of urban combat, military occupation, and the direct role of civilians at the center of the November and December military maneuvers around the city, which was positioned approximately equidistant between Washington, D.C., and Richmond. Principal battle locations included the Confederate position of Lt. Gen. James Longstreet’s corps on Marye’s Heights behind the city, the Union artillery position on Stafford Heights, the position of Lt. Gen. Thomas J. “Stonewall” Jackson’s Confederate corps at Prospect Hill south of the city of Fredericksburg, and the Rappahannock River itself, which was crossed only after Union engineers built a pontoon bridge under fire. The campaign is noted for Union Army shelling of the city itself as a military position, the failed, multiwave Union infantry assaults against fortified positions, and the destruction of property on December 12 as the town itself was sacked.