[Endoperez]

Err, basing this to the fact (?) that Legionaires served 30 years before retiring, it would take 30 years (=12*30=360 turns) for a fresh Hastatus to retire. In fact, if age can change units, they would eventually become Principes, and then Triarii, and then retire. And even if he didn't fight in any battle at all, he would have 4th star of experience, gained just from serving in the military over 200 turn/months.

For a triarii (lets say 25 years already served) to retire, it would take "only" 5*15 = 75 turns. Besides, I think this aging system could be continued to magical creatures, so that they serve only a year/three/ten before returning to their home plane. It would be an interesting shift to the Seasonal Spirits if they retired in the second "late Season" before their own season. With this, Winter Wolves summoned in winter would last longer than Winter Wolves summoned in summer.