Thomas Weir (American soldier) Thomas Weir (American soldier) Captain Thomas Benton Weir (b. September 28, 1838 -– d. December 9, 1876) was an officer in the 7th Cavalry Regiment (United States), notable for his participation in the Battle of the Little Bighorn, also known as Custer's Last Stand. Weir served under General George Armstrong Custer during the American Civil War, and after the war continued serving with Custer up to the famous battle in 1876. During the Little Bighorn Battle, Weir disobeyed orders to remain in a defensive position at Reno Hill and led a cavalry group that attempted to come to Custer's aid.
Battle of the Little Bighorn to why he refused them and what advantage their availability might have conferred on his forces at the Battle of the Little Bighorn. One factor concerned Major Marcus Reno's recent 8-day reconnaissance-in-force of the Powder-Tongue-Rosebud Rivers, June 10 to 18. This deployment had demonstrated that artillery pieces mounted on gun carriages and hauled by horses no longer fit for cavalry mounts (so-called condemned horses) were cumbersome over mixed terrain and vulnerable to breakdowns. Custer, valuing the mobility of the 7th Cavalry and recognizing Terry's acknowledgement of the regiment as "the primary strike force" preferred to remain unencumbered by the Gatling