Chief sitting bull led the coalition of plains tribes against the us seventh cavalry unit and defeated them at June 1876 conflict known as

I believe its (little big horn) cause well cause i took the test

The conflict was known as Little Big Horn

The battles was held between the army Lakota, Northern Cheyenne, and Indian tribes versus the 7th Cavalry Regiment of the United States led by Custer.

Due to the overwhelming loss that experienced by the United States side, this battle was alson known as Custer's Last Stand