"We believe the first step began with the retrieval of the Bastion unit. The prime unit Sentinels that were behind the events known as Zero Tolerance were adrift after the defeat of their leader Bastion. The prime Sentinel’s ability to morph into normal looking men and women allowed them to infiltrate the facility that Bastion was being held in and retrieved him. If the Bastion unit retrieved, it wasn’t long before the prime Sentinels returned to their primary function; a systematic eradication of all mutant life on Earth. Prior defeat at the hands of the X-Men no doubt dictated a radically different strategy from those employed in Zero Tolerance. Thus, very unusual alliances were formed."