"Well, if one side seems to get the upper hand in the war, we'll weaken them, and keep them at each other's throats.
The Bretonians had been launching serious counters against the KNF until we mauled Cambridge.
Right now, the Kusari are winning, reports showing that the Nagasaki is advancing on Harris, so hitting Rheinland shouldn't be a problem. If that war goes as we expect, and both Rheinland and Liberty get involved, we can attack whichever side is stronger, to keep all of the Houses weak and near-collapse."
Ares thinks that they can soften the House governments by weakening them as they punish each other's militaries. Only then will they be fragile enough for a popular revolution to begin in their homes, for the benefit of all Sirius.