Portrait of Union Soldier Sergeant Abraham G. Mills Who Served With Company E of the 165th New York Volunteer Infantry Regiment During the American Civil War (1862)

Portrait of Union soldier Sergeant Abraham G. Mills who served with Company E of the 165th New York Volunteer Infantry Regiment (also known as the Second Battalion, Duryée’s Zouaves) during the American Civil War, 1862. From the book History of the Second Battalion Duryee Zouaves One Hundred and Sixty-fifth Regt. New York Volunteer Infantry published in 1905.

Ambrotype Portrait of an African American Union Soldier Named Qualls Tibbs Who Served With the 27th United States Colored Infantry During the American Civil War (1860's)

Ambrotype portrait of an African American Union soldier named Qualls Tibbs who served with the 27th United States Colored Infantry during the American Civil War, c. 1864-1865.

Source: Smithsonian National Museum of African American History and Culture.

Animated Time-Lapse Portrait of Union Army General Edwin Sumner During the American Civil War (1860's)

Animated time-lapse portrait of Union Army general Edwin Sumner during the American Civil War, c. 1861-1865.

Source: National Archives and Records Administration.

Portrait of a Union Soldier Posing With a Horse During the American Civil War (1860′s)

Portrait of a Union soldier posing with a horse during the American Civil War, c. 1861-1865. Attributed to Mathew Brady.

Source: Library of Congress.

Portrait of Union Drummer Boy George D. Howell Who Served With Company H of the 23rd Pennsylvania Volunteer Infantry Regiment During the American Civil War (1860′s)

Portrait of Union drummer boy George D. Howell who served with Company H of the 23rd Pennsylvania Volunteer Infantry Regiment during the American Civil War, c. 1860′s. From the book History of the Twenty Third Pennsylvania Volunteer Infantry Birney's Zouaves Three Months and Three Years Service published in 1904.

Portrait of an Unidentified Mounted Union Officer Posing With an African American Camp Servant in a Camp During the American Civil War (1860′s)

Portrait of an unidentified mounted Union officer posing with an African American camp servant in a camp during the American Civil War, c. 1860′s.

Source: Library of Congress.

Animated Stereoscopic Portrait of Colonel Percy Wyndham Who Served with the 1st New Jersey Volunteer Cavalry Regiment During the American Civil War (1860's)

Animated stereoscopic portrait of Colonel Percy Wyndham who served with the 1st New Jersey Volunteer Cavalry Regiment during the American Civil War, c. 1860's. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Portrait of an Unidentified Union Officer During the American Civil War (1860′s)

Portrait of an unidentified Union officer during the American Civil War, c. 1860′s. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Portrait of an Unidentified Union Officer During the American Civil War (1860′s)

Portrait of an unidentified Union officer during the American Civil War, c. 1860′s. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Animated Stereoscopic Portrait of an Unidentified Union Officer During the American Civil War (1860's)

Animated stereoscopic portrait of an unidentified Union officer during the American Civil War, c. 1860's. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Portrait of an Unidentified Union Officer During the American Civil War (1860′s)

Portrait of an unidentified Union officer during the American Civil War, c. 1860′s. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Portrait of Union Officer Lieutenant H.B. Barstowe During the American Civil War (1860′s)

Portrait of Union officer Lieutenant H.B. Barstowe during the American Civil War, c. 1860′s. By Mathew Brady.

Source: National Archives and Records Administration.

Copy Negative of a Carte De Visite Portrait of an Unidentified Union Soldier During the American Civil War by Washington DC Photographer C.M. Bell (1800's)

Copy negative of a carte de visite portrait of an unidentified Union soldier during the American Civil War by Washington, D.C., photographer C.M. Bell in the late 1800's.

Source: Library of Congress.

Animated Stereoscopic Portrait of Union Soldier A.C. Allen of the 22nd Regiment New York State Militia near Harpers Ferry, Virginia (1862)

Animated stereoscopic photographs of Union soldier A.C. Allen of the 22nd Regiment New York State Militia near Harpers Ferry, 1862. Attributed to Mathew Brady.

Source.

Animated Stereoscopic Portrait of Union General Winfield Scott Hancock During the American Civil War (1860's)

Animated stereoscopic portrait of Union general Winfield Scott Hancock during the American Civil War, c. 1860's. By Mathew Brady.

Source.

Animated Stereoscopic Portrait of a Union Officer Identified as A. H. White (1860's)

Animated stereoscopic portrait of a Union officer identified as A. H. White, c. 1860's. By Mathew Brady.

Source.

Animated Stereoscopic Portrait of a Union Officer Only Identified as Powell (1860's)

Animated stereoscopic portrait of a Union officer only identified as Powell, c. 1860's. By Mathew Brady.

Source.

Portrait of Union Brigadier General Charles Stone With His Daughter During the Civil War (1863)

Portrait of Union Brigadier General Charles Stone with his daughter, Hettie, during the Civil War, c. 1863. By Mathew Brady.

Source.

Soldiers’ Homestead Advertisement by Union Veteran and Attorney Henry N. Copp Who Briefly Served With Stroud’s Independent Company, Pennsylvania Cavalry (Railroad Troops) During the Civil War (1902)

Soldiers’ homestead advertisement by Union veteran and attorney Henry N. Copp who briefly served with Stroud’s Independent Company, Pennsylvania Cavalry (Railroad Troops) during the Civil War, 1902. From the book Official Program and Pictorial Souvenir of the 36th Annual Encampment of the Grand Army of the Republic.

Hand-Colored Tintype Portrait of an Unidentified Armed Union Soldier Wearing a Fur Hat During the Civil War (1860's)

Hand-colored tintype portrait of an unidentified Union soldier during the Civil War.

Source.