chapotraphouse

The US might miraculously find deposits of rare earth metals and then the war could get very long and very bloody.

If there was a realistic enormous certified deposit of every single rare earth mineral in the most Goldilocks location and the deck was stacked for this deus ex machina miracle, it wouldn't matter.

In mining a deposit of minerals is a concentration of minerals. Think Minecraft, in a 9x9x9 cube the vein takes up an 8x8x9 space and runs into the next 9x9x9 cube. That's what mining companies look for.

Rare earths are called rare earths not because there are few deposits, it's because they're more uniformly distributed in low quantities in mineral deposits. Again think Minecraft, but for every 9x9x9 cube there is a single block of antimony.

Rare earths cannot create mining economies of scale. The reason China has the most rare earth production is because they "use every part of the Buffallo" more than other country's mining companies do. Rare earths are usually not refined from minerals that contain them in America because the labor to do so is too expensive. America's access to rare earths has always been an economic question of cheap labor, not a question of locating the resources.

The US might miraculously find deposits of rare earth metals

Reminder that rare earths are not actually rare, it's just that China has 85% of world refining capacity for them as it takes some doing. In a full on war footing, pull out all the brakes type situation the US could absolutely spin up some not as efficient, very dangerous for workers, expensive, but workable emergency capacity, it wouldn't put them on par with China but it would be enough to continue a war with selective strikes (instead of constant, high intensity bombardments hourly for weeks on end) and after that point the US would almost certainly continue to build up that capacity and make it a point to attempt to wean the rest of the world off Chinese rare earths.

It would also result in all kinds of other unforeseen consequences. For example the US may have the capacity to hack and physically damage or destroy Chinese electrical or other infrastructure but obviously isn't going to do that right now. But if a hot war unfolds and especially one where the US isn't winning they might break out those offensive state malware toolboxes and start wreaking incredible havoc within China that could cost a lot of money, take a lot of lives and result in a lot of chaos, uncertainty and problems that would take quite some time to sort out. The more electronically connected and "smart" everything is as in China the easier it is to fuck up everything, ironically the US by not being as "advanced" as China in adopting network connectivity to various things is a harder target in this regard. China is well aware of this risk, the US basically compromised everything in China with their shipments of NSA hardware back-door chipped Cisco routers and devices which Snowden revealed and though it's been more than a decade since they became aware I have to assume they're still inside many systems lurking and waiting.

They have the ability to stop incoming ICBMs, I can't guess if the success rate is 10% or 90%, but it's there.