2. Civil War Photos  Confederate Soldier, 1865 (LOC)

3. Civil War Photos  Union Flag, 1862(Library of Congress)

4. Civil War Photos  Morris Island, South Carolina. The shattered muzzle of a 300-pounder Parrott Rifle after it had burst, photographed in July or August of 1863. (Haas & Peale/LOC)

5. Civil War Photos  Engineers of the 8th N.Y. State Militia, 1861

6. Civil War Photos  Devil’s Den, Gettysburg 1863(Matthew Brady)

7. Civil War Photos  Federal ferry boat(LOC)

8. Civil War Photos  A group of "contrabands" (a term used to describe freed or escaped slaves) in front of a building in Cumberland Landing, Virginia, on May 14, 1862. (James F. Gibson/LOC)

9. Civil War Photos  A Pontoon bridge near Petersburg, Virginia, in April of 1865. (LOC)

10. Civil War Photos  Serving as a soldier in uniform and getting regular army pay, a former slave (center, with hands in pockets) stands with other Federal soldiers at the Army of the Potomac winter headquarters near Fredericksburg, Virginia, The log hut served as a mess house for the regiment. (AP Photo/Mathew B. Brady)

11. Civil War Photos  A party of the 50th New York Engineers builds a road on the south bank of the North Anna River, near Jericho Mills, Virginia, on May 24, 1864. (Timothy H. O'Sullivan/LOC)

12. Civil War Photos  Confederate dead lie among rifles and other gear, behind a stone wall at the foot of Marye's Heights near Fredericksburg, Virginia on May 3, 1863. Union forces penetrated the Confederate lines at this point, during the Second Battle of Fredericksburg. (Mathew Brady/NARA)

13. Civil War Photos  A March, 1863 photo of the USS Essex. The 1000-ton ironclad river gunboat, originally a steam- powered ferry, was acquired during the American Civil War by the US Army in 1861 for the Western Gunboat Flotilla. She was transferred to the US Navy in 1862 and participated in several operations on the Mississippi River, including the capture of Baton Rouge and Port Hudson in 1863. (LOC)

14. Civil War Photos  A Federal encampment on the Pamunkey River, Cumberland Landing, Virginia, in May of 1862 (Alexander Gardner/LOC)

15. Civil War Photos  The 150th Pennsylvania Infantry camp on Belle Plain, Virginia, is pictured in March 1862, three weeks before the Battle of Chancellorsville. (AP Photo/Library of Congress)

16. Civil War Photos  The Movable Menace, railroad artillery(Mathew Brady/LOC)

17. Civil War Photos  Confederate Camp

18. Civil War Photos  Sherman Pretzels, Sherman’s March to the Sea, Georgia 1864(LOC)

19. Civil War Photos  Massachusetts 54 th Regiment, was the first black regiment recruited in the North. Col. Robert Gould Shaw, the 25 year old son of very wealthy abolitionist parents, was chosen to command. Their first conflict with Confederate soldiers came on July 16, 1963 when the regiment repelled an attack on James Island, SC. But on July 18 came the supreme test of the courage and valor of the black soldiers; they were chosen to lead the assault on Battery Wagner, a Confederate fort on Morris Island at Charleston.Col. Robert Gould Shaw,Battery Wagner,

20. Civil War Photos  Inflation of the Intrepid, a hydrogen gas balloon used by the Union Army Balloon Corps for aerial reconnaissance. The Balloon Corps operated a total of seven balloons, with the Intrepid being favored by Chief Aeronaut Thaddeus Lowe. (Mathew Brady/NARA)

21. Civil War Photos  Civil War Hospital