Units also saw action on both sides of the American Civil War, with many companies of the regiment combined to form the Union Army's 1st West Virginia Infantry.

Captain Robert Rutherford’s Company of Rangers was raised from volunteers of Morgan’s Battalion in early 1758 and served through 1759.

Captain Cornelius Bogard’s Company of Volunteer Rangers of Monongalia County was in state service in 1794.

[5] Elements with Union sympathies were reorganized in May 1861 at Wheeling and mustered into federal service as the 1st Virginia Volunteer Infantry Regiment, a three-month unit.

For at least three years (1931–33) the regiment also trained some 26 company-grade Organized Reserve infantry officers of the 100th Division at Camp Dawson.

The 201st transferred to Adak Island in November 1942 and to Amchitka in January 1943 before departing Alaska on 22 March 1944 and returning to Seattle on 2 April 1944.

Beginning in April 1944, the regiment provided an accelerated six-week course of infantry training (four weeks of familiarization, qualification, and transition firing, and two weeks of tactical training) to men who were formerly members of disbanded anti-aircraft and tank destroyer units or who had volunteered for transfer to the infantry from other branches of the Army.

It arrived at Camp Rucker, Alabama, on 3 March 1945 under the Replacement & School Command and was inactivated there on 26 September 1945.

[11] Following the war’s end the 201st reverted to state control where it was reorganized and redesignated as the 201st Field Artillery Battalion.

While in theater, the battalion was subordinated to the 197th Fires Brigade of the New Hampshire National Guard and commanded by Colonel James Guise.

The 197th reported directly to III Corps Artillery, under the command of Brigadier General Richard Formica.

The Battalion Headquarters (HHB) operated out of Camp Cedar II and Tallil Airbase, both of which are approximately 10 miles (16 km) west of An Nasiriyah in the Dhi Qar province of Iraq.

C Battery would later move north to Camp Cedar II and Tallil Airbase and continue convoy security.

Some members of C Battery were also attached to the 1st Cav Division in Jan 2005 to provide extra security in Baghdad (they were stationed in the Hotel District: the Baghdad, Palestine and Sheraton Hotels across the river from the Green Zone) for the first elections while the rest of the unit and battalion trained their replacements.