The war between the US and The Great Plain Indians had many causes. The way the American settlers viewed the land contrasted greatly with the way the Indians viewed the land. Many settlers thought they could just take the land because they thought they would make better use of it. The Indians viewed the settlers as invaders. Increasing conflicts, especially in sacred land, angered even chiefs who welcomed settlers.
The Sand Creek Massacre - On November 29 1864 a group of 700 of a Colorado Territory Militia force attacked a Cheyenne and Arapaho Indian village. The attack was lead by US Army Col. John Chivington. The soldiers were said to have been drunk. Two thirds of the people killed were women and children.
Battle of Little Bighorn - This battle took place from June 25-26, 1876. It was fought between US Cavalry and northern Indian tribes. The Indians started the conflict due the the Cavalry's refusal to stay off tribal lands. The US tried to push the Indians back to their reservations but they were severely out numbered. The US lost the battle.
Battle of Wounded Knee - The Indians believed that a religious prophet would bring back traditional life. The Indians started to preform dances to lure the spirits out. The government saw this and declared the Indians were getting to reckless. The army was sent down. Indian police officers tried to calm the people. They killed an Indian chief and rounded up the rest of his followers at a creek called Wounded Knee. Someone fired a shot and the soldiers there started to open fire.