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.
Great Sioux War of 1876 actually been a village of Northern Cheyenne (led by Old Bear, Two Moons and White Bull) with a few Oglala (led by He Dog.) In the late spring of 1876 a second, much larger campaign was launched. From Fort Abraham Lincoln marched the Dakota Column, commanded by General Alfred Terry, with 15 companies or about 570 men, including Custer and all 12 companies of the Seventh Cavalry. The Montana Column, commanded by Colonel John Gibbon, departed Fort Ellis. General Crook commanded a third column that departed Fort Fetterman to head north. The plan was for all three columns to converge