For extraordinary heroism in connection with military operations involving conflict with an armed hostile force in the Republic of Vietnam on 14 February 1966. Private Coyle was serving as a medical aidman attached to an infantry rifle company. During an assault on Viet Cong positions, Private Coyle, though wounded and refusing evacuation, repeatedly exposed himself to insurgent fire in order to treat and evacuate other wounded personnel. While placing a wounded man in a covered position, he saw another wounded soldier lying in the midst of hostile fire. Leaving the cover of his position, Private Coyle ran through insurgent fire and attempted to aid his fallen comrade. While carrying this wounded man to safety, the hostile fire increased and Private Coyle was mortally wounded. His extraordinary heroism and supreme sacrifice were in keeping with the highest traditions of the United States Army and reflect great credit upon himself and the military service.