The medic, the HQ and the camp can treat the other units.
It costs some AP to make win some points of life to the wounded unit.
To treat brings back experience in the case of the medic.
From now to treat also brings back WarDollars but that is likely not to last!
It is not possible to treat a unit if enemy units are on the box of the medic, the HQ or the camp.
(It's not usual to treat in the heart of the engagements)
If you look after a remote unit whereas enemy units are on the same box as it, then the the profit of life is decreased by half.
A traditional profit of life is of 20 points of life. If the unit gains less point of life, except the case above,
it means that it arrived at its maximum of vitality.
A too tired casualty (over 80% of fatigue) must initially take again his breath.
Then the medic can deal with him.
A well camouflaged unit is nevertheless seen by a medic of its section and a camp of its company,
in order to be able to treat it. Idem for the HQ with all the units of its army.