[Tyrant]

I believe that there are 8 turns to a year in DomII, so that's just 12.5 years for a 100 turn game if the same scale is used in 3. At that rate it seems like very few units would really get hit by major aging effects, mostly early game lab mages. I'd think field troops have so many other threats to their well being that they'd be happy to last long enough to suffer the slings and arrows of old age.