The Battle of Capek Labs is a military engagement in the Second Martian Revolution primarily involving the Earth Defence Force and Marauders, though a small contingent of Red Faction also are onsite. The action takes place in and around the old Ultor Corporation science facility which had once been the laboratories of Axel Capek and has since been re-occupied by the Marauders, the descendants of the Ultor scientists who had once worked there. The catalyst for the battle is the Nano Forge, a piece of advanced nanotechnology that the Marauders had hoarded and now returned to its home.