Sisterhood of Suns: Widow's War

The dramatic sequel to "Sisterhood of Suns: Pallas Athena"
After placing The School under quarantine, the Sisterhood receives a shocking surprise: the society that the tiny settlement is a part of desperately needs their help. Rather than risk another disastrous war with Womankind, Hriss Clans have shifted their aggression to the Esteral Terrana Rapabla.

And the ETR is losing the fight.

Now the Sisterhood grapples with whether they should help their newly rediscovered neighbors, and what the effect will be on both societies if they do.