This is a list of regiments from the U.S. state of Louisiana that fought in the Union Army during the American Civil War (1861–1865). The list of Louisiana Confederate Civil War units is shown separately.
United States Colored Troops (USCT) were Union Army regiments during the American Civil War that primarily comprised African Americans, with soldiers from other ethnic groups also serving in USCT units. Established in response to a demand for more units from Union Army commanders, USCT regiments, which numbered 175 in total by the end of the war in 1865, constituted about one-tenth of the manpower of the army, according to historian Kelly Mezurek, author of For Their Own Cause: The 27th United States Colored Troops. "They served in infantry, artillery, and cavalry." Approximately 20 percent of USCT soldiers were killed in action or died of disease and other causes, a rate about 35 percent higher than that of white Union troops. Numerous USCT soldiers fought with distinction, with 16 receiving the Medal of Honor. The USCT regiments were precursors to the Buffalo Soldier units which fought in the American Indian Wars.
The Battle of Fort Bisland was fought in the American Civil War between Union Major General Nathaniel P. Banks against Confederate Major General Richard Taylor during Banks' operations against the Bayou Teche region in southern Louisiana.
This is a list of Confederate government Civil War military units, not raised by any state.
The 141st Field Artillery Regiment is a United States field artillery regiment.
The 108th Cavalry Regiment is a cavalry regiment of the Georgia and Louisiana Army National Guards of the United States Army.
The 10th United States Colored Heavy Artillery Regiment was an artillery regiment in the Union Army during the American Civil War that served in the New Orleans defenses. The unit was organized in New Orleans in November 1862 as the 1st Louisiana Heavy Artillery Regiment (African Descent), and redesignated as the 1st Corps d'Afrique Heavy Artillery Regiment a year later. It briefly became the 7th United States Colored Heavy Artillery Regiment in April 1864, then assumed its final designation in May.