June 25,1876
It all hapened when  Cononel George Armstrong Custer  did not obey  General Alfred Terry's orders.
Along the  Little Big Horn River 6 indian tribes camped  there. Some of the tribes were  Cheyenne, Sans Arcs, Blackfeet, and Oglala Sioux.
Custer  took his troop to where the  indians were  .They ran, scared.
By the end ( 20 minutes later ) 197 men were killed.