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 an expedition of this size, and part of the officer shortage was chronic, due to the Army's rigid seniority system: three of the regiment's 12 captains were permanently detached, and two had never served a day with the 7th since their appointment in July 1866. Three second lieutenant vacancies (in E, H, and L Companies) were also unfilled. The Army's coordination and planning began to go awry on June 17, 1876, when Crook's column retreated after the Battle of the Rosebud, just to the southeast of the eventual Little Bighorn battlefield. Surprised and according to some accounts astonished by the