Add to batllescape another faction - Militia - that always friendly to Civilians and lead them, but can attack aliens or x-com agents or both, depends on relations. They goal and regular behavior will be defense the Civilians and convoy them from site to exit map and eliminate other hostile factions after evacuation.

It will be nice to give Militia poor starting equipment depends on organization they belong. E.g. policemen from Megapol buildings or security agents from Gravball stadium or from Mutants factories.

How to calculate mission overall score by casualties in militia troops:

1. like regular Civilians (- to score anyway).
2. by relations with aliens (+ to score in case if relations with aliens are friendly).