Mississippi Rifles (Mexican–American War)

There were three distinct groups known as Mississippi Rifles that responded to governor Albert Gallatin Brown's call for volunteers to supplement the forces of the regular United States Army during the Mexican–American War.

The 1st Mississippi Rifles, led by future U.S. Senator and CSA president Jefferson Davis, had a famous victory at the Battle of Buena Vista.
The 2nd Mississippi Rifles, commanded by Colonels Reuben Davis and Charles Clark, had a tragicomic war experience. The unit was beset by a horrific smallpox outbreak that killed scores; even the ones who were not killed outright suffered horribly just the same. The remainder of their service was both intensely boring and chaotic, the chaos being fueled by the battalion's poor training, deficient leadership, and the youthful exuberance of the soldiery.
Anderson's Rifles, also known as the Mississippi Battalion, could fairly be called the third string of the Mississippi Rifles in the Mexican–American War. They make almost no appearances in the military and cultural histories of the conflict; they were briefly on garrison duty in Tampico.

1st Regiment

The original 10 companies of the 1st Mississippi Rifles, as originally mustered:

Company A: Yazoo Rifles - Capt. John M. Sharp
Company B: Wilkinson Volunteers - Capt. Douglas H. Cooper
Company C: Vicksburg Southrons - Capt. John Willis
Company D: Carroll County Volunteers - Capt. Bainbridge D. Howard
Company E: State Fencibles - Capt. John L. McManus
Company F: Lafayette Volunteers - Capt. William Delay
Company G: Raymond Fencibles - Capt. Reuben Downing
Company H: Vicksburg Volunteers - Capt. George Crump
Company I: Marshall Guards - Capt. James H. R. Taylor
Company K: Tombigbee Volunteers - Capt. Alexander K. McClung

2nd Regiment & Anderson's Rifles

According to the Mississippi Encyclopedia, "The 2nd Mississippi Rifles and Anderson's Battalion of Mississippi Rifles were raised as the result of later federal calls for troops. Neither unit participated in major combat operations..." In regard to the latter group, a biography of the group's commander, another future Confederate named J. Patton Anderson, states "In answer to the governor's call, Anderson organized a company of volunteers from the regiment of Mississippi militia in DeSoto County. He was elected captain. There is little information in records or newspapers regarding this battalion..." According to a newspaper account of October 20, 1847, "A battalion of five companies of riflemen from Mississippi, called out in July, has not yet been organized. It is supposed that it will be raised, and its strength may be estimated at 400." Anderson contracted malaria during his Mexican War service, and it caused him continuing health problems for the remainder of his life.