Battle of Little Big Horn Story
(1) Many things led to this but mainly an expedition into the Black Hills led by General Custer. He claimed there was gold and his men and others set up mining camps in the Black Hills which violated 1868 Fort Laramie treaty. U.S army offered to buy Black Hills for $6 million
(2) Sioux refused to go on reservation so U.S sent three pronged attack on the 3,000 NA of varying tribes. Custer attacked early and split his 750 men into three groups, of which two retreated.
(3) Custer and all his men were killed due to his arrogance