Lets say Phantaria continues the fight and Astrum send in troops. Asylon would not be far behind in striking Astrum, thus pulling Astrum from the Terran field. In that scenario, and with D'Hara and Farronite, in say a less than desired level by the theocracies, this could turn into a huge melee by lots of powers.
If Asylon reenters Astrum lands (note: it doesn't matter who has cassus belli), the Treaty of Walefishire could be invoked and FR would send aid to Astrum (FR would have the capability, since it doesn't look like it'll be supporting the Crusade directly). If Asylon decides to divert to FR because FR sent aid to Astrum, the Treaty of Mergrathor could be invoked and Niselur would send aid to FR. If D'Hara (who also seems to be against direct intervention in the Crusade) signs the Treaty of Port Raviel, they could also send aid to FR should Asylon attack.
Hopefully the treaties hold up! :3
