I liked the experience model in Masters of Magic (oh the memories...)
Every unit got one XP per turn. It got 4 XP for fighting a small battle, 10 for a large battle, and even more for huge battles and for taking cities.
Obviously it took hundreds and then thousands of XP to qualify for upgrades so just parking a unit in a safe city was not an effective way to make a great unit, but at least the spearman who was guarding your capital would be an elite unit by the end of the game.
I especially liked this model because heroes started the game incredibly weak, but quickly became very powerful. Sometimes you decide to leave you green hero in the capital for 30 turns so he could get his first upgrade for free. Obviously there's a lost opportunity cost there, but it did prevent him from getting killed by a dozen halflings with slingshots (damn I miss the slingers...)
In civ you could implement a similar idea. Every unit gets one XP for free every 50 turns. If your first warrior survives until the end of the game, it will be a very elite unit even if it never fought anything tougher than a lion. At the same time it doesn't dramatically change the strategy. There's still a good reason to disband old units (even an elite warrior sucks against tanks), but it reflects the value of vetran troops.
Every unit got one XP per turn. It got 4 XP for fighting a small battle, 10 for a large battle, and even more for huge battles and for taking cities.
Obviously it took hundreds and then thousands of XP to qualify for upgrades so just parking a unit in a safe city was not an effective way to make a great unit, but at least the spearman who was guarding your capital would be an elite unit by the end of the game.
I especially liked this model because heroes started the game incredibly weak, but quickly became very powerful. Sometimes you decide to leave you green hero in the capital for 30 turns so he could get his first upgrade for free. Obviously there's a lost opportunity cost there, but it did prevent him from getting killed by a dozen halflings with slingshots (damn I miss the slingers...)
In civ you could implement a similar idea. Every unit gets one XP for free every 50 turns. If your first warrior survives until the end of the game, it will be a very elite unit even if it never fought anything tougher than a lion. At the same time it doesn't dramatically change the strategy. There's still a good reason to disband old units (even an elite warrior sucks against tanks), but it reflects the value of vetran troops.
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