Is it any wonder they don't get along?

One reason the military has trouble coordinating joint operations is that the different services don't speak the same language.
For example, if Navy personnel were told to 'secure a building', they would, following a checklist written on a clipboard, unplug the equipment, turn off the lights, lock the doors, and depart.
Given the same instructions, Army personnel would follow a checklist written in a notebook. They would occupy the building, so that no one could enter and nothing could leave.
In execution of the same instructions, and following a plan written on the palms of their hands, Marines would assault the building, capture it by close combat, and defend it with suppressive fire.
The Air Force, on the other hand, following a protocol printed on a portable computer, would 'secure a building' by taking out a three-year lease on it with an option to buy.
from the Military Terms of the Modern Era website

(There may be some sarcasm involved here...)