american civil war appomattox campaign appomattox court house arizona territory arkansas army of mississippi army of missouri army of new mexico army of tennessee army of western louisiana army of the potomac army of the valley army of the west battle of antietam battle of chancellorsville battle of cold harbor battle of five forks battle of fredericksburg battle of gettysburg battle of malvern hill battle of seven pines battle of spotsylvania court house battle of the crater battle of the wilderness bristoe campaign confederate states army confederate states of america corps eastern theater of the american civil war gettysburg campaign gettysburg confederate order of battle gustavus woodson smith james longstreet jefferson davis maryland campaign militia new mexico territory northern virginia northern virginia campaign overland campaign peninsula campaign regiment seven days battles siege of petersburg stanford university press texas texas brigade union army valley district virginia units in the civil war