Photo of Union Soldiers of the Fitchburg Fusiliers in Front of the Rollstone House in Fitchburg, Massachusetts, Before Leaving to Fight in the Civil War (1861)

 

Portrait of Union soldiers of the Fitchburg Fusiliers in front of the Rollstone House in Fitchburg, Massachusetts, 1861. The photo was taken shortly before they left to fight in the Civil War as Company B of the 15th Massachusetts Infantry Regiment. Attributed to J. C. Moulton. From the book Fitchburg Past and Present by William Andrew Emerson published in 1903.

Union Soldiers at Bayonet Drill in a Camp During the American Civil War (1860's)

Union soldiers at bayonet drill in a camp during the American Civil War, c. 1861-1865. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

Portrait of a Group of Prussian Soldiers Said to be Taken in Southern Jutland During the Second Schleswig War (1864)

Portrait of a group of Prussian soldiers said to be taken in Southern Jutland during the Second Schleswig War, 1864.

Source: Royal Library, Denmark.

Portrait of a Group of Unidentified Union Soldiers Posing in an Unidentified Camp During the American Civil War (1860′s)

Portrait of a group of unidentified Union soldiers posing in an unidentified camp during the American Civil War, c. 1860′s. Attributed to Mathew Brady.

Source.

Portrait of Five Union Soldiers From Company D of the 13th Vermont Volunteer Infantry Regiment During the Civil War (1862)

Portrait of five Union soldiers from Company D of the 13th Vermont Volunteer Infantry Regiment during the Civil War, 1862. Identified as from left to right: Marquis F. Marrs, Julius F. Densmore, Henry O. Clark, George Stevens, William L. Blake. From the book Pictorial History Thirteenth Regiment Vermont Volunteers War of 1861-1865.

Portrait of a Group of Unidentified Police Officers Armed With Bayoneted Muskets and Onlookers Posing in Front of the Metropolitan Hotel in New York City (1860′s)

Portrait of a group of unidentified police officers armed with bayoneted muskets and onlookers posing in front of the Metropolitan Hotel in New York City, c. 1860′s. By Silas A. Holmes and Charles DeForest Fredricks.

Source.

View of Union Soldiers and Sailors Posing on an Unidentified Ferry Gunboat During the Civil War (1860's)

View of Union soldiers and sailors posing on an unidentified ferry gunboat during the Civil War.

Source.

A Group of Union Soldiers of the 134th Illinois Volunteer Infantry Regiment on Picket Duty Near Columbus, Kentucky (1864)

A group of Union soldiers of the 134th Illinois Volunteer Infantry Regiment on picket duty near Columbus, Kentucky, 1864. By John Carbutt.

Source.

Two Portraits of Union Soldiers Posing in Front of a Hut in an Unidentified Winter Camp During the Civil War

Two portraits of Union soldiers posing in front of a hut in an unidentified winter camp during the Civil War. Attributed to Mathew Brady.

Source 1.
Source 2.

A Group of What Are Believed to be French Zouaves and Chasseurs Posing for the Camera at an Unidentified Location (1860's)

A group of what are believed to be French Zouaves and chasseurs posing for the camera at an unidentified location, c. 1860's.

Source.

Thanks to Gary Dombrowski and members of Civil War Talk for pointing out that these are probably French troops.

View of Union Troops Building a Pontoon Bridge Over the Port Royal Sound in Beaufort, South Carolina (1862)

View of Union troops building a pontoon bridge over the Port Royal Sound in Beaufort, South Carolina, March 1862. By Timothy O'Sullivan. Animated stereoview.

Source.

A Group of Union Engineers of the 12th Regiment New York State Militia Posing in Front of a Barracks Building in Camp Anderson in Washington, D.C. (1861)

A group of Union engineers of the 12th Regiment New York State Militia posing in front of a barracks building in Camp Anderson in Washington, D.C., 1861. Attributed to Mathew Brady.

Source.

Union Soldiers of the 12th Regiment New York State Militia Posing Between Two Rows of Barracks in Camp Anderson in Washington, D.C. (1861)

Union soldiers of the 12th Regiment New York State Militia (probably Company I) posing between two rows of barracks in Camp Anderson in Washington, D.C., 1861. Attributed to Mathew Brady.

Source.

Union Soldiers of the 7th Regiment New York State Militia Posing in Camp Cameron in Washington, D.C. (1861)

Union soldiers of the 7th Regiment New York State Militia posing in Camp Cameron in Washington, D.C., 1861. Attributed to Mathew Brady.

Source.

View of Townswomen Presenting Union Colonel John D. Stevenson of the 7th Missouri Volunteer Infantry Regiment and His Men With a Flag During a Ceremony in Lexington, Missouri (1862)

View of townswomen presenting Union Colonel John D. Stevenson of the 7th Missouri Volunteer Infantry Regiment and his men with a flag during a ceremony in Lexington, Missouri, 1862.

Source.

Union Soldiers of the Cassius M. Clay Battalion Posing in Front of the White House in Washington, D.C. (1861)

Union soldiers of the Cassius M. Clay Battalion posing in front of the White House in Washington, D.C., April 29, 1861. Image from Lincoln in Photographs: An Album of Every Known Pose

Union Soldiers of the 42nd Ohio Volunteer Infantry Regiment in Plaquemine, Louisiana (1864)

Union soldiers of the 42nd Ohio Volunteer Infantry Regiment in Plaquemine, Louisiana, 1864. From Miller's Photographic History of the Civil War.

Union Soldiers and Civilians Posing at Camp Willey on Wheeling Island, Virginia (1862)

Union soldiers and civilians posing at Camp Willey on Wheeling Island, Virginia, 1862.

Source.

Union Soldiers of the 22nd Regiment New York State Militia Posing in Camp Near Harpers Ferry, Virginia (1862)

Union soldiers of the 22nd Regiment New York State Militia posing in camp near Harpers Ferry, Virginia, c. 1862. Attributed to Mathew Brady.

Source.

Union Soldiers From Company I of the 7th Wisconsin Volunteer Infantry Regiment During the Civil War in Fredericksburg, Virginia

Union soldiers from Company I of the 7th Wisconsin Volunteer Infantry Regiment during the Civil War in Fredericksburg, Virginia.

Source.