Moving The Pieces (Preparations for War, #4)

The die is cast.

The demons have mobilized to attack the Empire, and Joe and Asina are behind enemy lines.

For 150 Earth years, Joe and Asina have been clandestinely helping the humans of Calmena prepare for the coming war.  In that time, the Calmenans have gone from barely Iron Age to the brink of space. From scattered starveling communities hanging on by their fingernails to proud independent city-states.  But now the demons are pushing enough troops through the Seven Gates of Calmena to wipe out the human cities in passing.

Joe and Asina will not allow that to happen.