Federal troops occupying line of breastworks on the north bank,  North Anna River, Virginia. May 18…

 Earthworks in front of Petersburg, Virginia. 1865.

President Lincoln with officers on battlefield "Battle of Antietam" September 1862.

President Lincoln with officers on battlefield "Battle of Antietam" September 1862. "Restored Image"…

Soldiers cooking food in the woods of Gettysburg.

Soldier with rifles at Gettysburg.

Ammunition train of 3d Division, Cavalry Corps Brandy Station, Virginia 1864.

Union soldiers in trenches before Petersburg, Virginia. December 1864.

Twin houses on battlefield with 32-pdr. field howitzer in foreground, Seven Pines, Va. June 1862.

President Lincoln and Gen. George B. McClellan in the general's tent at Antietam, Md. October 3,1862…

Confederate dead gathered for burial at the edge of the Rose woods,Gettysburg, Pennsylvania. July 5,…

Dead Confederate soldiers in trenches of Fort Mahone, Petersburg, Virginia. April 3, 1865.

Dead Confederate soldier in trenches of Fort Mahone, Petersburg, Virginia. April 3, 1865.

Three Confederate prisoners, Gettysburg, Pennsylvania, July 1863.

Chevaux-de-frise in front of Confederate works at Petersburg, Virginia.

Chevaux-de-frise on battlefield, Atlanta, Georgia. 1864.

General G.G. Meade headquarters at Gettysburg.

View from Culp's hill Gettysburg, Pennsylvania.

Little Round Top mountain "Battle of Gettysburg" Gettysburg, Pennsylvania. July 1863.

Little Round Top, "Battle of Gettysburg" Gettysburg, Pennsylvania. July 1863.

Aerial View of battlefield from signal tower, Petersburg, Virginia.

Captain Ballerman's battlefield kitchen, Captain Ballerman in seen tasting the soup.