James Morrow Walsh, (22 May 1840 – 25 July 1905) was a North-West Mounted Police (NWMP) officer and the first Commissioner of the Yukon Territory. Born in Prescott, Ontario, James Walsh was one of the original officers of the NWMP. Superintendent Walsh was assigned in 1875 to establish a post in the Cypress Hills in what is now Saskatchewan. He named it Fort Walsh after himself. The location of the post was determined by the Cypress Hills Massacre in 1873, an atrocity stemming from the illegal American whiskey trade. Walsh's original role was to shut down this trade, but in June 1876 his position grew in importance when several thousand Sioux crossed the border into Canada, taking refuge there after the Battle of Little Big Horn. They settled near the Wood Mountain post in present-day Sask