(From left) Sgt. Richard Matulja and Sgt. Ryan Montell,

(From left) Sgt. Richard Matulja and Sgt. Ryan Montell, of the 16th Engineer Brigade, collect data points along the left boundary of the existing tank range in Varpalota, Hungary, June 20, 2016. The soldiers are conducting a survey as part of Operation Resolute Castle. Soldiers from Tennessee, Alabama, Ohio, and Mississippi Army National Guard will work together with service members from the United States Navy, Air Force, and Marine Corps during Operation Resolute Castle to expand military bases throughout Eastern Europe. (U.S. Army Photo by Spc. Victoria Williams, 16th Engineer Brigade, Ohio Army National Guard)