With the recent developments between Kusari and Rhineland, I would not be a bit surprised if tensions over the Kusari / Bretonia war begin to force the two into not only an economic ally but a strategic one as well. While Liberty must work to ensure her own security, Rhineland may not be the only security threat now.
As to rendering assistance, I believe Liberty would do what it could, if for nothing else, to extend and protect it's own economic interests, while maintaining stable relations with both combatants. Of course, I also see opportunity there for further intrigue.