Crazy Horse was born around 1840 and was a leader of the Oglala Lakota tribe of present-day South Dakota. After seeing the death of the Lakota leader Conquering Bear, Crazy Horse began to have trances so his father took him on a vision quest. Crazy Horse received a black stone from a medicine man named Horn Chips to protect his horse which made him believe that he and his horse were one in battle.
Through the late 1850s to the early 1860s Crazy Horse's reputation as a warrior grew through the Lakota tribe. In 1864, he joined with other tribes to fight the US military following the Sand Creek Massacre. In 1865, he earned the title Ogle Tanka Un which meant war leader. On December 21, 1866, Crazy Horse and six other warriors, both Lakota and Cheyenne, decoyed Capt. William Fetterman's 53 infantrymen and 27 cavalry troopers under Lt. Grummond into an ambush. The Lakota warriors swept over the hill and attacked the infantry. Additional Cheyenne and Lakota hiding in the buckbrush along Peno Creek effectively surrounded the soldiers. Seeing that they were surrounded, Grummond headed his cavalry back to Fetterman. The combined warrior forces of nearly 1,000 killed all the US soldiers, in what became known at the time to the white population as the Fetterman Massacre. It was the Army's worst defeat on the Great Plains up to that time.
On the morning of September 5, 1877, Crazy Horse and Lieutenant Lee, accompanied by Touch the Clouds as well as a number of Indian scouts, departed for Fort Robinson. Arriving that evening outside the adjutant's office, Lieutenant Lee was informed that he was to turn Crazy Horse over to the Officer of the Day. Lee protested and hurried to Bradley's quarters to debate the issue, but without success. Bradley had received orders that Crazy Horse was to be arrested and taken under the cover of darkness to Division Headquarters. Lee turned the Oglala war chief over to Captain James Kennington, in charge of the post guard, who accompanied Crazy Horse to the post guardhouse. Once inside, Crazy Horse struggled with the guard and Little Big Man and attempted to escape. Just outside the door, Crazy Horse was stabbed with a bayonet by one of the members of the guard. He was taken to the adjutant's office, where he was tended by the assistant post surgeon at the post, Dr. Valentine McGillycuddy, and died late that night.