US MIC is so corrupt that it can't even produce basic artillery shells for a large scale war. Last I checked the current target, which is not being reached is something like 38,000 heavy shells produced a month for the USA. So in 1 year the US can make the same number of heavy shells the Russians used in 12 days of serious offensive operations in 2022...
At the same time the Pentagon claimed that the North Koreans gave the Russians a 'present' of 1 million heavy shells for their war recently.
It should be pretty shocking that in 2023 the US munitions production is so poor. For comparison In WW2 to defeat the Germans in the 3 month Normandy campaign the Allies used millions of artillery rounds. As late as Vietnam the US used more explosives than they did in all of WW2.