[shatner]

Yes. If a province had 101 resources and I built a single 1-resource unit, then the remaining 100 resources went to repairing the armor of my soldiers and commanders there, with commanders appearing to get their armor repaired before soldiers, if possible. I did notice that if I had a bunch of 14 resource soldiers and a handful of 9 resource soldiers (for example) that a handful bit of both would get their armor repaired each time, though there tended to be more 9res soldiers repaired than 14res.

I interpret that to mean that the game picks soldiers in some order (random, by most resources to least, in unit id #, who knows) and would repair as much as it could, but once the number of available resources got too low (say down to 10), it would skip over all the 14res soldiers and repair additional 9res soldiers instead.

Still, my tests weren't controlled enough for me to know for sure.