▁if ▁occupied . ▁Occ up ying ▁key ▁provinces ▁within ▁a ▁state ▁allows ▁the ▁occup ying ▁power ▁to ▁access ▁the ▁enemy ' s ▁fact ories ▁and ▁natural ▁resources ▁in ▁that ▁state . ▁Res istance ▁to ▁occupation ▁within ▁a ▁state ▁can ▁ham per ▁the ▁occup ying ▁power ' s ▁control ▁over ▁it . ▁Late ▁in ▁the ▁game , ▁nations ▁may ▁develop ▁nuclear ▁bomb s ▁if ▁they ▁have ▁the ▁proper ▁technology , ▁which ▁can ▁be ▁used ▁to ▁dev ast ate ▁enemy ▁provinces ▁and ▁states . ▁ ▁He arts ▁of ▁Iron ▁IV ▁also ▁attempts ▁to ▁re create ▁the ▁complex ▁diplom atic ▁relationships ▁of ▁the ▁day . ▁Nations ▁may ▁undert ake ▁a ▁variety ▁of ▁diplom atic ▁actions ; ▁they ▁may ▁sign ▁non - ag gression ▁p act s , ▁guarantee ▁the ▁independence ▁of ▁other ▁nations , ▁and ▁offer ▁or ▁request ▁military ▁access , ▁amongst ▁other ▁things . ▁Another ▁key ▁feature ▁of ▁diplom acy ▁is ▁the ▁ability ▁to ▁create ▁a ▁fa ction ▁or ▁inv ite ▁other ▁nations ▁to ▁an ▁existing ▁one . ▁F actions ▁represent ▁the ▁main ▁al li ances ▁of ▁the ▁era , ▁like ▁the ▁A xis ▁and ▁Al lies ▁( for ▁game play ▁purposes , ▁real - world ▁fa ctions ▁like ▁the ▁A xis ▁and ▁Al lies ▁are ▁split ▁into ▁numerous ▁smaller ▁fa ctions , ▁like ▁the ▁Com intern , ▁the ▁Chinese ▁United ▁Front , ▁and ▁the ▁Co - Pro s per ity ▁S phere ). ▁F action ▁members ▁may ▁assist ▁each ▁other ▁in ▁wars , ▁making ▁fa ction ▁members ▁pre cious ▁assets . ▁Some ▁more ▁c