Boarding actions between star vessels are truly deadly affairs, vicious and swift close-quarter duels in the most treacherous and dangerous environments imaginable. In short, the kind of conflict the Space Marines were created for. The vessels of the 31st Millennium ranged in size and role from interplanetary cargo scows to mighty battleships with crews numbering in the thousands serving as the flagships of the Imperium's far-ranging Expeditionary fleets. Larger still were Mechanicum mass-conveyers tens of kilometres in length, and unfathomably ancient drifting Space Hulks that dwarfed even these. In the case of these larger vessels, regardless of whether they were an engine of war or a colony ark, their sheer size granted them weaknesses to be exploited, just as their immense bulk made th