Eugene Mortimer Baker
Eugene Mortimer Baker (July 7, 1837 – December 19, 1884) was a major in the United States Army, and served as an officer in the 2nd Cavalry Regiment in the Western Territories of the United States. He is most known for his role in the Marias Massacre in early 1870 and from the lack of discipline he faced following the event. Early life 
Eugene Mortimer Baker was born in Fort Ann, New York on July 7, 1837. He registered for military service at the age of 17 in 1854. Military career

Fort Ellis 
In 1870, Major Eugene M. Baker was promoted to commanding officer of Fort Ellis in the Montana Territory and served in this post until 1873. This was to bolster his manpower to compensate for the winter campaign against Native Americans that he was put in charge of the previous year. Marias Massacre 
In late 1869, after several years of rising tensions between indigenous people and white colonists, a white rancher by the name of Malcolm Clarke was murdered by Peter Owl Child and several other Piegan Blackfeet Native Americans. This murder was at first dismissed as a familial dispute, but after the Helena Citizens Committee and the convening of a grand jury found that Native Americans in the Montana Territory had caused great loss to the white settlers, General Philip Sheridan planned offensive attacks against the Piegans in the winter. General Sheridan selected Major Baker to lead the expedition party into Blackfoot territory and gave him command of Fort Ellis. On January 6, 1870, Major Baker took over 200 hundred infantry and 55 cavalry out of Fort Ellis and marched toward the Marias River. When the company came upon Chief Heavy Runner's camp, not the camp of Owl Child, they opened fire at dawn. Heavy Runner attempted to halt the attack by presenting documents to Major Baker, which Major Baker dismissed. Major Baker's men killed Heavy Runner and resumed their attack on the camp. Reports ranged the death toll to the Piegan Blackfeet somewhere between 150 and 300, among the casualties were women, children, newborns, and the elderly. Post-Massacre 
Reports of the actions of Baker and his force were contradictory, with Native American survivors claiming that they were brutally attacked without warning at dawn and the U.S. Army reporting that the conduct of the troops was commendable and that the Piegan Natives were repeatedly warned that their actions would lead to consequences. Major Alfred Bates, the writer of the chronicle of the Second Regiment, criticized the eastern press for holding Baker in negative esteem while simultaneously hailing Baker and his men as heroes. Baker and the Second Cavalry were active in the Montana Territory from 1870 to 1884, taking part in several more raids against Native Americans in the territory. In the summer of that year, the entire regiment was transferred to Fort Walla Walla in Washington Territory. Death 
Baker died in Fort Walla Walla, Washington on December 19, 1884 at the age of 47. References 

1837 births
1884 deaths
American murderers of children
United States Army personnel of the Indian Wars
Native American genocide perpetrators