Much of the national memory of the Civil War centers on the battles between the Army of the Potomac and the Army of Northern Virginia. In part, this has to do with noted writers Bruce Catton and Douglas S. Freeman, who concentrated on the war in Virginia. In his trilogy The Civil War: A Narrative, Shelby Foote redirected attention to the struggle outside Virginia, especially Tennessee, Mississippi, and Georgia. But the war was fought in thousands of locations, including New Mexico Territory and even the Arctic Ocean.