A U.S. Marine with Marine Rotational Force-Europe 19.2, Marine Forces Europe and Africa, prepares to fire an M224 60 mm… https://www.rawpixel.com/image/3319092/free-photo-image-18-1st-battalion-2nd-marine-divisionFree Image from public domain licenseU.S. Soldiers with the 2nd Battalion, 503rd Infantry Regiment, 173rd Infantry Brigade Combat Team (Airborne) engage opposing… https://www.rawpixel.com/image/8739183/photo-image-public-domain-people-gunFree Image from public domain license