The commando gives your unit the ability to use the enemies roads and rails. The backside is that in order to use this your unit gets lost from the other and can end up in an vulnerable situation. The idea with this is ofcourse that you go behind enemy lines and destroy resource improvements. And you can also escape ofcourse. But how to use it efficiently? Anyway the promotion requires a 4 star.. if im not wrong this means 40% health added to the units basestrength. So its hard to get. This makes the promotion almost absolete So is it worth the 5 promotions it requires? Is there a way you can use it so effeciently that it is 5 promotions worthy?