One reason the Military has trouble
operating jointly is that they don't speak the same language. For example, if you
told Navy personnel to "secure a building," they would turn off the lights and
lock the doors.
Army personnel would occupy the building so
no one could enter.
Marines would assault the building, capture
it, and defend it with suppressive fire and close combat.
The Air Force, on the other hand, would
take out a three-year lease with an option to buy.