PFC Horns was a Ranger automatice rifleman assigned to C Company, 2nd Battalion, 75th Ranger Regiment at Joint Base Lewis-McChord. Horns completed One Station Training at Fort Benning, GA, as an infantryman. After graduating from the Basic Airborne Course, he was assigned to the Ranger Assessmentand Selection Program. He was assigned to C Co, where he served as an assistant machine gunner and automatic rifleman.