Benjamin Franklin “Grimes” Davis (October 1831 – June 9 1863) was an American army officer who served in the Indian Wars and later commanded Union cavalry units during the American Civil War. He is noted for his leadership in the escape from the Confederate‑encircled Union garrison at Harpers Ferry and for being killed in action at the Battle of Brandy Station.
Early life and education
Born in Alabama in October 1831, Davis was the eldest of six sons of Benjamin E. and Matilda Holladay Davis. After the deaths of both parents by 1846, he and his brothers were placed under the guardianship of their uncle, William Taylor, in Monroe County, Mississippi. Davis received an appointment to the United States Military Academy at West Point, New York, and graduated in 1854, joining a class that included future generals such as Jeb Stuart and Oliver O. Howard.
Pre‑Civil War service
Commissioned into the 5th U.S. Infantry, Davis transferred to the 1st U.S. Dragoons on 3 March 1855. He saw combat against Apache forces in New Mexico, where he was wounded, and served on frontier duty in New Mexico and California. In August 1861 he was appointed lieutenant colonel of the 1st California Volunteer Cavalry Battalion, a post he resigned in November 1861 to return east with the 1st U.S. Cavalry. He was promoted to captain of the 1st U.S. Cavalry on 30 July 1861.
Civil War service
In June 1862 Davis was commissioned colonel of the 8th New York Cavalry Regiment. While stationed at Harpers Ferry in September 1862, he and Lt. Col. Hasbrouck Davis organized a night‑time breakout of approximately 1,300 Union cavalrymen, crossing the Potomac River on a pontoon bridge and evading Confederate pickets. This maneuver allowed the Union force to avoid surrender and rejoin the main army.
Later, Davis commanded the 1st Brigade, 1st Division of the Union Cavalry Corps, participating in the Peninsula Campaign, the Northern Virginia Campaign, and the Chancellorsville Campaign. He was killed in action on 9 June 1863 during the Battle of Brandy Station in Virginia. He is interred at West Point Cemetery.
Family
Three of Davis’s brothers served in the Confederate States Army, two with the 11th Mississippi Infantry and one with the 2nd Mississippi Infantry. The brothers on the Confederate side suffered heavy casualties, and the surviving brother later took his own life.
Legacy
Davis’s military career is remembered for his frontier service, his role in the Harpers Ferry escape, and his leadership of Union cavalry during pivotal Eastern Theater operations. Historical markers and biographical works, such as An Ornament to His Country: The Life and Military Career of Benjamin Franklin Davis (2023), commemorate his contributions.
