The medic promotion for land units increases the heal rate of that unit, and those in adjacent hexes.
I've just had a thought, but unfortunately am not at home to check, so thought I'd ask before I forget about it: Does the effect of the promotion stack?
If I have three injured units with the promotion and place them in a triangle formation (so they are each adjacent to the other two), and fortify them all to heal, will they each receive a bonus of:
- +3 (+1 from themselves and +1 from each of the other 2 units)
- +2 (+1 from themselves and +1 from a non-stacking adjacent effect)
- +1 (+1 from themselves; no stacking at all)
- Something else?