I've lived through over two decades of hearing about this or that upstart movement in the echelons that tries to orient us towards urban warfare, or peacekeeping ops, or "low-intensity conflict" and "operations other than war" and so on and so forth.
It's more like every 10-15 years or so, the Army gets a bug in it's ass which essentially amounts to:
Oh my god, we'll be obsolete unless we can rapidly deploy a force within x amount of hours!
in response to some perceived failing or threat to the Army's status in the overall Service Pecking Order (TM).
It first occured in the 1950s; you can see the evidence of it in the
M56 Scorpion; then it laid down and died a bit until the good old
M551 Sheridan came around. There was a whole package deal of proposed Sheridan derivatives, like APC, flame tank, SP AA gun, etc for the mobile, lightweight force!
After the dismisal overall performance of the Sheridan, the concept died again......until 1979.
In the wake of teh Iranian Crisis, the Army decided that yes, a rapid deployment force would be needed; and actually did type-classify the
LAV-25 as the Mxxx something. I'm in North Carolina now, sO I can't get to my sources; but the US Army LAV-25 was basically the USMC LAV-25, but with less seats for infantry, and more 25mm ammunition.
In the end, the army decided not to buy the LAV-25; and the entire RDF concept was allowed to die, along with the fetish for lightweight mania.
But then came Clinton and Kosovo; and the Army got all upset and drew the wrong conclusions from how long it took to move a few Apaches to Kosovo, where one of them promptly crashed, versus the time it took for the USMC to hypothetically deploy to the area, and thus was born the STRYKER and FCS!
Both being hypothetically capable of being rapidly theater deployed via the mighty C-130!
These non-traditional thinkers get to serve as the distraction of the year
Or they decide to leave the "normal" side of things and go into the high speed low drag special forces side of things, where they can get killed in anomynity! Good for everyone; nobody loses!
or, at best, treated other operations as sideshows that represent dangerous distractions from the dominant mindset.
It's the truth actually, because you can use a huge combined arms army to do a lot of things; including "Stability" and "Peacekeeping" operations; albeit as a slightly blunt instrument; you can't use specialized units like Delta Force, or the Green Berets as a straight up force; the SEALs found that out the hard way in Panama, when they tried to take on a Panamanian force guarding an airfield....and the Panamanians had AK-47s and the SEALs MP-5s...you can guess what happened...
Even now, when we try to break away from the mindset, we end up taking it with us and applying the same mode of thought to the new ideas-- hence we end up with 'one-size-fits-all' monolithic endeavours like the FCS.
FCS is a dangerously flawed system built on using "infinite" RHAe applique armor from "information dominance" to win fights against conventional forces, while being light enough to be deployed fast enough and to fight guerilla wars cheaper than the legacy "heavy" force.
It doesn't work that well, and it explains why we have soft-skin trucks and HumVees with zero combat worth going into combat, trying to be escorted by similar vehicles that have been modified to serve as gun trucks.
Mainly because the insurgency in Iraq has been quite unpreceedented in it's scale of firepower. In Vietnam, you could still use Jeeps and other light vehicles for a lot of "in country" tasks, because all the explosive material, etc had to be humped down from North Vietnam via the Ho chi Minh trail, and so the VC and NVA had to use their scarce explosives for things other than blowing up SPC Stuckledick in his Jeep.
Same thing in Bosnia and Kosovo; there was little opposition to us there; excepting perhaps a couple of shots fired and a few windshields starred by bullets.
So we went in expecting that we could use unarmored vehicles in large numbers, only to find out that the Insurgents in Iraq had access to vast quantities of explosives from Saddam-era ammunition dumps; some of them were as large as small cities and were just sitting in the desert by themselves with no guards; making it easy to loot them for 155mm shells, semtex, etc in the early phase of 2003-2004 when we were still trying to get a handle on the country.
This means that the minimum vehical for random duties in Iraq is more akin to a heavy armored car than the traditional soft skin vehicle used.
The Army is still resistant to the idea of armored cars and dedicated, purpose-built light warfare vehicles
Because after Iraq, they'll be useless, and will have separate logistics chains set up for them, as well as having really high silhoulettes, and being dangerously top heavy and roll-over prone, along with having a lack of interior space (the "v" shaped anti-blast hull cuts into interior space a lot).
Most likely the next generation humvee replacement will have much better IED resistance in the specs from the start; but it will not be a straight up M1117 ASV.