At Little Bighorn in June 1876, Custer attacked a massive Lakota and Cheyenne encampment without reinforcements and was nearly completely wiped out — a decisive Lakota military victory. But it was a Pyrrhic win: the news enraged a centennial-celebrating America, painted Custer as a martyr, and ended any US interest in diplomacy with the Lakota, accelerating the seizure of the Black Hills.