Battery "M" 4th Regiment of Artillery was a light artillery battery that served in the Union Army during the American Civil War.
(United with 4th U.S. Light Artillery, Battery H February 1862 to January 1863.)
Artillery, 4th Division, Army of the Ohio, to September 1862.
10th Brigade, 4th Division, II Corps, Army of the Ohio, to November 1862.
Artillery, 2nd Division, Left Wing, XIV Corps, Army of the Cumberland, to January 1863.
Artillery, 2nd Division, XXI Corps, Army of the Cumberland, to October 1863.
1st Division, Artillery Reserve, Department of the Cumberland, to October 1864.
Buell's Campaign in northern Alabama and middle Tennessee June to August.
Passage of the Cumberland Mountains and Tennessee River and Chickamauga Campaign August 16-September 22.