Two Portraits of Union Soldiers From the Color Guard of the 7th Regiment New York State Militia Posing With the Unit’s Regimental and National Colors at Camp Cameron in Washington, D.C. (1861)

Two portraits of Union soldiers of the color guard of the 7th Regiment New York State Militia posing with the unit’s regimental and national colors at Camp Cameron in Washington, D.C., 1861. Attributed to Mathew Brady.

Source 1.
Source 2.

Union Soldiers in Square Formation During the Civil War

Union soldiers drilling in square formation during the Civil War. Location unknown. Attributed to Mathew Brady.

Source.

Two Portraits of the Color Guard of the 7th Illinois Volunteer Infantry Regiment Posing With Their Flags and Henry Repeating Rifles

Two portraits of Union soldiers from the color guard of the 7th Illinois Volunteer Infantry Regiment posing with their flags and Henry repeating rifles. The rifles could be fired at a rate of 28 rounds per minute.

Link.
Link 2.