since the game does not show your unit's 'health' values and the fact that most vehicles have 'sections' that can be damaged (again with no visible values), this becomes nearly impossible to do (i.e invincible units), plus the fact that you would be trying to separate enemy from friendly.
if someone has a way to look at the unit's 'health' then we may be able to do something. however, it seems that one shot pretty much kills most troops, etc.
there may not be more that we can do with this game-
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