The Arkansas Regiment of Mounted Gunmen was employed in Indian Territory during the Seminole War/Texas War of Independance. There a few other Civil War Names in this that you may recognize.
https://en.wikipedia.org/wiki/Arkansas_Militia_and_the_War_with_Mexico
Arkansas Regiment of Mounted Gunmen
The first use of the Arkansas State Militia occurred in the same month that Arkansas was admitted to the union, June 1836. Several events contributed to the Federal Government's call for troops from Arkansas. The Second Seminole War began in Florida in 1836, at the same time, the Texas War of Independence was underway. Federal Government removed its regular army troops from forts and posts in the Indian Territory in order to supply troops for the fighting in Florida. Many of the remaining regular army troops were transferred to posts along the Sabine River, positioned to either prevent a Mexican invasion or to assist the Texas revolution as directed. President Jackson asked for and was granted funds by Congress to raise a volunteer force from Arkansas to help fill the void left by regular forces along the border with the Indian Territory. Secretary of War Lewis Cass issued a call for troops to Territorial Governor William Savin Fulton on May 15, 1836. Fulton responded by issuing a proclamation calling for 1,000 volunteers. The volunteers were to assemble into companies, elect officers and report to the Governor immediately. The Governor's proclamation was published in the same edition of the Arkansas Gazette that reported on the passage in Congress of the act which admitted Arkansas to the Union.
On June 28, 1836, 13 days after the state was admitted to the Union, General Edmund P. Gains (U.S. Army) called upon the Governor to furnish one regiment for the defense of the western frontier. Governor Fulton responded by revising his call for volunteers. The Governor's call specified that the volunteer companies raised North of the Arkansas River would rendezvous at Little Rock, while those raised South of the river would rendezvous at Washington in Hempstead County. The organization of the volunteer companies played out against the backdrop of the first political race for the office of Governor of Arkansas. Absalom Fowler, a Whig candidate, ran against James S. Conway, a Jacksonian Democrat. Conway won the hotly contested race in the election conducted on August 1, 1836. By August 18, 1836, volunteer companies from Conway, Pope and Pulaski counties had gathered in Little Rock. These three companies marched south for the rendezvous at Washington, Arkansas and were joined en route by a company from Saline County. These four companies made the rendezvous at Washington with the company raised from Hempstead County, bringing the total to five companies. Being short of the number of companies needed to form a regiment, the unit was formed initially into a battalion, to be commanded by a lieutenant colonel. An election was held at Washington, Arkansas and Absalom Fowler, the former candidate for Governor, was elected lieutenant colonel of the battalion. The other officers were as follows:
County Rank Name
Lieutenant Colonel Absalom Fowler
Adjutant Robertson Childress
Sergeant Major Samuel D. Blackburn
Quarter Master Allen Martin
Surgeon Dr. James Bird
Conway Captain Thomas Mathers
1st Lieutenant Alexander G. McFarland
2nd Lieutenant Peter Kuykendall
Saline Captain Robert Brazil
1st Lieutenant Jesse Spence
2nd Lieutenant Johnson J. Joyner
Pulaski Captain John R. Cummins
1st Lieutenant William Badgett
2nd Lieutenant William W. White
Pope Captain Laban C. Howell
1st Lieutenant John R. H. Scott
2nd Lieutenant Samuel Hays
Hempstead Captain Samuel Moore
1st Lieutenant Robert L. Davis
2nd Lieutenant Robert Cross
Sevier Captain Charles Pettigrew
1st Lieutenant Robert Walker
2nd Lieutenant William Whitehead
On the march from Washington, Arkansas to Fort Towson, the battalion was joined by an additional company from Sevier County, bringing the total to six. The battalion reached Fort Towson on the Red River on September 14, 1836.
An additional Volunteer Company, raised in Randolph County, commanded by Captain John Kavanaught, stopped in Little Rock long enough to participate in the inauguration of the new state's first elected Governor, James S. Conway. Conway dispatched the company to join the volunteers at Fort Towson with an order directing that since the battalion would now have seven companies, in should be formed into a regiment and an election held for Colonel Commandant. This order was delivered to Lt. Col. Fowler on October 2, 1836 when the Randolph County company reached Camp Vose, near Fort Towson. Lt. Col. Fowler apparently did not believe that the Governor had the authority to order an election because the unit was now under the control of the regular army. Nonetheless, a new election was conducted for the office of Colonel Commandant, Adjutant and Lieutenant Colonel. In this second election, Captain Laban C. Howell defeated Fowler and was elected Colonel. Fowler had not run for the office of Lt. Col. and Charles Pettigrew was elected to this office. Fowler refused to recognize the election but placed Howell, as senior captain, in acting command while Fowler traveled to Little Rock to plead his case to his former political foe, Governor Conway. Conway attempted to solve the issue by finding that while Howell had been properly elected Colonel of the Regiment, Fowler was still the duly elected Lt. Col because Conway said he had not directed an election for that office. Lt. Col. Fowler returned to the regiment and continued to claim the right of command, at one point even having Colonel Howell, and several supporters whom Fowler labeled as "mutineers", placed under arrest. General Arbuckle, who was in overall command, had to intervene by threatening to arrest Fowler in order to compel him to release Howell. Both would write letters to the paper explaining their view and Fowler would eventually demand a Court of Inquiry in order to clear his name.Two additional companies joined the regiment, one from Lawrence County commanded by Captain Willis Phillips in late October and one from Independence County commanded by Captain Marcus W. Reinhardt in late November, bringing the regiment to its final strength of nine companies. The regiment was ordered into winter quarters at Fort Gibson. Now secure in his command, Col Howell organized the regiment into the following lettered companies:
Company Enrolment Date County
A August 9, 1836 Conway
B August 12, 1836 Saline
C August 18, 1836 Pope
D August 31, 1836 Hempstead
E August 13, 1836 Pulaski
F September 3, 1836 Sevier
G September 5, 1836 Randolph
H November 24, 1836 Independence
I October 31, 1836 Lawrence
While their leaders quarreled the soldiers of the Arkansas Regiment of Mounted Gunman performed scout duty and patrolled the border until they were relieved in 1837 by federal troops. Twenty two members of the 1st Regiment of Arkansas Mounted Gunmen would die in service. Causes of death included accidents and disease, but none was due to hostile action. By February 7, 1837, General Arbuckle had discharged most of the Arkansas troops to return to their homes.
2nd Regiment of Arkansas Mounted Gunmen.
Through a twist of historical irony, the 2nd Regiment of Arkansas Mounted Gunmen never came into existence, but the 1st Battalion of the 2nd Regiment did. In August 1836, General Matthew Arbuckle (U.S. Army) made a second requisition on Governor Fulton for troops and the governor responded by calling on the counties of Carroll, Crawford, Independence, Izard, Jackson, Johnson, Lawrence, Scott, Searcy and Washington to raise their militia companies. The Volunteer Companies for what was intended to become the 2nd Regiment of Arkansas Mounted Gunmen were ordered to rendezvous at either Fayettville, or Fort Coffee, Indian Territory. Only three companies eventually answered this call for troops.
Company Commander Enrolled in Federal Service County
A Captain Onesimus Evans September 27, 1836 Washington
B Captain Benaiah Bateman September 30, 1836 Independence County
C Captain Thaddeus C. Wilson November 26, 1836 Washington
The three responding companies were organized under a single battalion, commanded by Oneumus Evans, who was promoted to Major. Major Evans signed his address to his troops at the end of their deployment as the "Commander, 1st Battalion, 2nd Regiment of Arkansas Mounted Gunmen". The muster rolls for this battalion also bear the designation of 1st Battalion, 2nd Regiment. The battalion was increased to a total of five companies in January 1837 when the first seven companies of the 1st Regiment were mustered out of service. Companies H and I of the 1st Regiment were reassigned to the 1st Battalion of the 2nd Regiment for the remainder of their service. Like their brothers in the 1st Regiment, the members of Evans Battalion spent the winter of 1836–1837 conducting patrols and Indian Territory and occasionally escorting supplies to other army posts further south along the Sabine River. The battalion was mustered out of service between March 27 and April 13 at Camp Washington, near Fort Gibson. The battalion suffered 7 deaths and 5 desertions during its service. None of the deaths were due to hostile action.
One Regular Army observer of the Arkansas troops on the frontier wrote to the Arkansas Gazette with the following description of their service:
"So far as the Arkansas Volunteers, it is but just to say that their conduct, while they have been in Indian Territory, has been, with but few exceptions, such as to entitle them to much credit: their deportment towards the natives has ever been respectful and proper. Those volunteers... have served in both the Choctaw and Cherokee nations and have had an opportunity of seeing and of becoming acquainted with the actual condition and feeling of the Indians on the frontier towards the whites, and they will, by that means, have it in their power to.... allay the unnecessary apprehension of Indian hostilities which has to long existed on this frontier.
The fight between Absalom Fowler and Governor Conway continued to play itself out in the local papers until well into 1837, with supporters of the Governor and Colonel Howell on one side and Lieutenant Colonel Fowler each writing descriptions of the events for the papers.