A Soldier from the 45th Infantry Brigade Combat Team, Oklahoma Army National Guard radios his unit notifying them the heavy machine guns manned by soldiers of the Ukranian army’s 28th Mechanized Infantry Brigade have finished firing so their fellow Ukranian soldiers can advance on an objective during a live-fire training exercise at the Yavoriv Combat Training Center on the International Peacekeeping and Security Center, near Yavoriv, Ukraine, in 2017. (Photo by Sgt. Anthony Jones, 45th Infantry Brigade Combat Team)