Military action
After responding to a distress signal, the Canterbury was ambushed and destroyed by an unknown stealth ship, presumed to be Martian in origin.
After the Canterbury encountered a distress signal on the asteroid CA-2216862, XO Jim Holden and several others of the crew investigated the signal with the Knight shuttle. Upon finding the moored and empty ship Scopuli there, transmitting an apparent decoy distress signal, the Canterbury was destroyed by what seemed to be Martian forces.