<p>One other thought…</p>
<p>I think that we will continue to have the current four Armed Services until such time as the media in which they fight change.</p>
<p>Many, many years from now, when Man has finally managed to get off the planet in force, it will make sense to have only a Navy and a Marine Corps. The Navy would control all vessels (including what we traditionally call “warships”, and both tactical and strategic “aircraft”) with the Marines being in charge of surface operations on whatever celestial body we happen to be attacking. The arrangement makes sense because the traditional media of air, land, and water will no longer apply. All we’ll have is Space and Planetary.</p>
<p>Needless to say, that is WAY, WAY, WAY in the future, so the Woops and Zoomies are safe for now. ;)</p>