2nd Lt. Matthew Kemelek, assistant operations officer, Headquarters and Headquarters Troop, 1st Squadron, 2d Cavalry Regiment, listens attentively to Kasia Kardasiewicz, a Polish linguist for Mission Essential currently working at the Battle Group Poland, as she teaches grammar rules during a Polish language class at the Bemowo Piskie Training Area, Poland, June 19, 2018. Battle Group Poland is a unique, multinational coalition of U.S., U.K., Croatian and Romanian Soldiers who serve with the Polish 15th Mechanized Brigade as a deterrence force in support of NATO’s enhanced Forward Presence ini - Stock Photo