Posting this here after I saw it over at Lightfighter.net:

I´ve been reading a swedish book from the 60´s and the author is refering to an american study about combat skills. A bunch of combat veterans from WWII, Korea and Vietnam was asked to rank 27 different combat/soldier skills for infantrymen. The most preffered(?) skill was "handling firearms" to no27 "driving a vehicle"
Anyone know the text of which he is talking about?