oh and one other thing, if you lose all but a few in a unit that has chevrons, DONT join them to a unit that has none as they can all lose the chevrons. Instead wait till you can get to a city and retrain them.
However if you have 5 or something with no chevrons, you can merge them with a high chevron - nearly full unit and they will gain the chevrons of that unit.
Just a tit bit of info i hope you find useful.
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