Just speculating about the morale/experience levels ...
There are basically three levels: normal, veteran and elite. A city with barracks will create veteran units. When a unit wins a battle, there´s a chance that it gets promoted, thus eventually becoming elite. Furthermore, elite units winning a battle may sometimes "spawn" a great leader.
The morale levels seem to have different numbers of hitpoints: 3 for the normal level, 4 for veteran and probably 5 for elite. Look at this (older) screenshot (http://www.civfanatics.com/cgi-bin/a...19-19-2225.jpg) and notice the coloured dots associated with the units: Either a single red dot (seriously damaged units) or two yellow dots (damaged units), but there are as well units with three as units with four green dots.
Things are starting to fall in place.
There are basically three levels: normal, veteran and elite. A city with barracks will create veteran units. When a unit wins a battle, there´s a chance that it gets promoted, thus eventually becoming elite. Furthermore, elite units winning a battle may sometimes "spawn" a great leader.
The morale levels seem to have different numbers of hitpoints: 3 for the normal level, 4 for veteran and probably 5 for elite. Look at this (older) screenshot (http://www.civfanatics.com/cgi-bin/a...19-19-2225.jpg) and notice the coloured dots associated with the units: Either a single red dot (seriously damaged units) or two yellow dots (damaged units), but there are as well units with three as units with four green dots.
Things are starting to fall in place.
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