Equine Line Marines ride horses with Mongolian youth at Five Hills Training Area, Mongolia, June 17, 2018, during Khaan Quest 18, a multinational exercise designed to strengthen international peace support capabilities. SHARE: Download: Full Size (3.38 MB) Tags: Marine Corps, DOD in Photos Credit: Army Sgt. Heidi Kroll VIRIN: 180617-Z-HS490-016C.JPG Photo Gallery