U.S. Army Staff Sgt. Curtis Chancey, center, teaches Ukrainian soldiers how to determine grid coordinates and points on a map during a map reading and land navigation class at the International Peacekeeping and Security Center near Yavoriv, Ukraine, March 5, 2016. Chancey is an infantryman assigned to the 3rd Infantry Division’s 3rd Battalion, 15th Infantry Regiment, 2nd Infantry Brigade Combat Team. Army photo by Staff Sgt. Adriana M. Diaz-Brown