We do have the Sierra Army Depot but those are not near enough in ready condition to fight a quick war. I guess its easier to build new ones than restore older equipment.
. One thing is for sure. We could not spin up 10 - 20 mech/armor divisions in case WWIII breaks out or a 2 front world war say, vs Russia, and Vs China in a large conventional sense.
Given the right motivation, the Abrams that are stored there could be back in the fight in short order.
What a photo - looks like a couple of brigades’ worth of APCs and CPs in just the little bit of detail I can identify.