I took Glut the Sovereign to the hostile Duergar.
During the fight, I resurrected Ghek the leader with Glut's spore ability.
After the fight, I declined to help Glut so he became hostile and I killed him.
Reanimated Ghek was still there after a rest, so I decided I should just kill him to get him off my map.
After he dies in battle, combat mode persists, and may characters are taking opportunity attacks against each other, but I have control of all of them.
Combat never ends, no matter how far spread I make my characters.
Hope that's enough info.