24th Regt. U.S. Colored Troops. Let Soldiers in War, Be Citizens in Peace

Drawing of the regimental flag and motto of the 24th Infantry Regiment, United States Colored Troops, ca. 1865
Full Transcript
The motto on the flag reads: “Let Soldiers in War, Be Citizens in Peace.”
Questions
What does the motto on the flag of the 24th Regiment convey about the men’s view of military service and citizenship?
What can we infer about the significance of the 24th Regiment’s contributions to the Union Army based on this photograph?