WordNet sense 1 (characterized by plundering or pillaging or marauding):

marauding, raiding

WordNet sense 2 (for the purpose of attack rather than defense):

offensive

WordNet sense 3 (living by preying on other animals especially by catching living prey):

rapacious, ravening, vulturous, raptorial, vulturine

WordNet sense 4 (living by or given to victimizing others for personal gain):

predaceous, predacious

WordNet sense 5 (eager to acquire and possess things especially material possessions or ideas):

acquisitive

WordNet sense 6 (having or showing determination and energetic pursuit of your ends):

aggressive