As it turns out, Kairo’s element would have the most difficulty. The marines moved through with cold efficiency, eliminating room after room. Most of the Orks were unprepared, either in terms of equipment and gear on hand or they were just shocked by the quickness of the Dark Angel’s planetfall. That is not to say they were all unable to fight back, nor was the Marine dogma, training, or skill so infallible that things could not go wrong.