Polish soldiers explain to US Army Europe Soldiers how to load their missile system during exercise Panther Assurance 2015, March 21. Nearly 100 Soldiers from the 5th Battalion, 7th Air Defense Artillery Regiment arrived at Sochachew, Poland, for a combined training exercise. The air defense Soldiers will train for several days with Polish troops from the 3rd Air Defense Brigade, outside of Warsaw. The US Army Europe based unit traveled 1200 kilometers with their 30 vehicles and other support equipment.