That was something I was thinking about.
With 10 years of constant fighting, gear would slowly, yet surely go to crap.
US troops would go from this, looking like they are dressed for a long 3 days somewhere in Afghanistan, to this, looking like they are prepping to fight Ivan in the Fulda Gap in West Germany. Heck, some might end up looking like this, digging in the jungles to fight Charlie.
Or some god-awful combination of the three.