MarsGuard Crockett Class Monitor Class History The Crockett class was under construction when the Drakh attacked Earth. It was 89% complete when the Drakh destroyed her and her sistership in orbit of Earth. These monitor hulls were offered to Mars in an aid bill, and Mars jumped at the chance to have these defense ships. Unfortunately, they were destroyed just months from being delivered. Mars entered into negotiations to acquire another hull after the Drakh plague was cured. Crockett Class SCS