It does make a difference. One of the largest differences is this: Army Colonial says go over there and draw fire. You go over there and draw fire. Navy Capta

It does make a difference. One of the largest differences is this: Army Colonial says go over there and draw fire. You go over there and draw fire. Navy Captain says go over there and draw fire. You and the Captain go over there and draw fire. Another difference: Your boat is all by itself a strategic asset that can literally alter the outcome of an entire world war. Every submarine fits this description (even fast attack subs can carry fairly long range nuclear weapons if needed). So the mission is important, and the people who carry it out treat it that way.