Something kind of strange I noticed was the fact that the entire Damocles Gulf Crusade (the attempted war to exterminate the Tau) consisted of about 7 Imperial Navy cruisers, two Imperial Guard armored regiments (about 25,000 soldiers)  five Space Marine companies from different chapters.  (probably with their own strike cruisers), and a Rogue Trader.  Such a force sounds like what will ultimately be needed to pacify the Mextil Cluster, though it seems pathetically inadequate to take down the Tau.<br/><br/>At any rate, Ares should have one armored regiment and two infantry regiments, for a total of 27,000 soldiers, but with no functional orbital defenses, casualties were likely very very high.