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 based on the Yellowstone River at the mouth of the Bighorn and reinforced by Gibbon's column. On August 8, 1876, after Terry was further reinforced with the 5th Infantry, the expedition moved up Rosebud Creek in pursuit of the Lakota. It met with Crook's command, similarly reinforced, and the combined force, almost 4,000 strong, followed the Lakota trail northeast toward the Little Missouri River. Persistent rain and lack of supplies forced the column to dissolve and return to its varying starting points. The 7th Cavalry returned to Fort Abraham Lincoln to reconstitute. The regimental commander, Colonel Samuel D. Sturgis, returned