The Battle of Monocacy (also known as Monocacy Junction) was fought on July 9, 1864, just outside Frederick, Maryland, as part of the Valley Campaigns of 1864, in the American Civil War. Confederate forces under Lt. Gen. Jubal A. Early defeated Union forces under Maj. Gen. Lew Wallace. The battle was part of Early's raid through the Shenandoah Valley and into Maryland, attempting to divert Union forces away from Gen. Robert E. Lee's army under siege at Petersburg, Virginia. The battle was the northernmost Confederate victory of the war.