He was a member of the 4th U.S. Cavalry during the Texas–Indian Wars and, while battling the Kiowa and Comanche in the Staked Plains in November 1874, killed a Native American in armed combat.

He immediately reenlisted while stationed in Hamilton County, Tennessee in December 1863, weeks after the Battle of Wauhatchie, and was promoted to the rank of sergeant at the end of the month.

He decided on a career in the military, however, and enlisted in the Regular United States Army four months after leaving the volunteer service.

Artillery in Brownsville, Texas and spent the next three years in the Southern United States during Reconstruction before being discharged at Greenville, Louisiana on November 28, 1868.

On November 5, 1874, while his regiment was battling the Kiowa and Comanche near Lake Tahokay in the Staked Plains, Comfort was separated from his unit and killed an Indian in armed combat.