Che Guava
The Juicy Revolutionary
Fachy: Not a bad idea, and there is certainly some good reasons behind it (soldiers don't come back to life after a sufficient rest period!), but I think this is just one of the things that you just have to accept in a game in order to make it playable, silly as it may be! I mean, if you rally sent a band of warriors accross the continent in search of new civilizations, they'd likely be dead about 3 tiles outside of your city (considering how fast times goes in the ancient ages), but putting that in the game wold just make it no fun!
Having said that, I do think that there should be certain conditions for unit recovery, and on e of those should be access to the resources that are required to build them: i.e. horseman cannot fully recover in a city (or a tile without a road to a city) that doesn't have access to horses, swordsman/iron, musketmen/saltpeter. I think this might meet some of your concerns about spontaneous regernation, as well as creating a crude supply-line...
Having said that, I do think that there should be certain conditions for unit recovery, and on e of those should be access to the resources that are required to build them: i.e. horseman cannot fully recover in a city (or a tile without a road to a city) that doesn't have access to horses, swordsman/iron, musketmen/saltpeter. I think this might meet some of your concerns about spontaneous regernation, as well as creating a crude supply-line...