|Born||July 24, 1828|
|Died||June 6, 1885 (aged 56)|
Atlantic City, New Jersey
|Place of burial|
|Allegiance||United States of America|
|Service/||United States Army|
|Years of service||1850–1885|
|Rank|| Brigadier General|
Brevet Major General
|Commands held||3rd U.S. Cavalry|
1st U.S. Cavalry
|Battles/wars||American Civil War|
Grover was born in Bethel, Maine, the younger brother of Governor and Senator La Fayette Grover of Oregon. A graduate of the United States Military Academy in 1850, Grover was stationed in the western frontier before being transferred to help in defense preparations of Washington, D.C., at the outbreak of the Civil War. He was appointed brigadier general of volunteers in April 1862, but with a date of rank of April 14, 1861, the day after the evacuation of Fort Sumter, making him one of the more senior generals in the Army. He served as a brigade commander in the III Corps of the Army of the Potomac, in which role he won distinction at the Battle of Williamsburg and was brevetted lieutenant colonel in the regular army, and winning promotion to full colonel for gallantry at the Battle of Seven Pines.
His brigade was later transferred to the command of Maj. Gen. John Pope and cited for bravery in leading a bayonet charge against Confederate forces of Stonewall Jackson at the Second Battle of Bull Run.
Grover was transferred to the Department of the Gulf in December 1862 and commanded a division in the XIX Corps during the capture of Baton Rouge and the Siege of Port Hudson. Returning to the East in August 1864, he participated in the Third Battle of Winchester, Fisher's Hill, and Cedar Creek, where he was wounded and brevetted to the rank of major general of volunteers. Before the war's end, Grover was brevetted to major general in the regular army on March 13, 1865, before returning to frontier and garrison duty with the U.S. Cavalry.
- Hennessy, pp. 245-51.
- Eicher, John H., and Eicher, David J., Civil War High Commands, Stanford University Press, 2001, ISBN 0-8047-3641-3.
- Hennessy, John J., Return to Bull Run: The Campaign and Battle of Second Manassas, University of Oklahoma Press, 1993, ISBN 0-8061-3187-X.
- Linedecker, Clifford L., ed., Civil War, A-Z: The Complete Handbook of America's Bloodiest Conflict, New York: Ballantine Books, 2002, ISBN 0-89141-878-4.
- Warner, Ezra J., Generals in Blue: Lives of the Union Commanders, Louisiana State University Press, 1964, ISBN 0-8071-0822-7.