Tank attack on post stamp

Keywords:

canceled, collection, stamp, picture, communications, postage, mail, post, postmark, letter, mark, philately, vintage, retro, label, old, illustration, image, Poland, 1968, Polish, Army, acting, people, action, activity, active, history, victory, war, tank, attack, army, fight, battle, combat, soldier, regular, private, anniversary, weapon, armor, barrel, tracks, battalion, regiment, force, military, power, man,