Insight into Armor Repair Mechanic

[shatner]

I have confirmed that the exact same repair mechanics apply in castle-less provinces and that indie troops with broken armor have their armor stay broken. Specifically, on turn X I invade an indie province, hit them with Acid Storm and retreated. On turn X+1 I invaded again and the armor of all the enemy troops was still broken; none had been repaired during the course of a turn.