If the United States had the capacity to make enough ammunition and ordnance to fight multiple wars at the same time, there would be enough people employed by these companies that you would probably personally know at least 1 of them.
All those places together do not even employ 400,000 people. I work in manufacturing and I don’t know a single person who works at these places. What I’m saying is so many new jobs would be created that MILLIONS of people would from that point on be in the defense sector making bombs and bullets. It’s not even comparable.
Walmart is a big employer. Can they supply war munitions? Being a big employer is genuinely irrelevant unless the bulk of those employees are making munitions
A very large portion of American military doctrine is centered around avoiding overextension.
And yet they are currently already overextended.
The US Navy is currently extremely overextended. They are currently losing what Navy officers have described as the largest naval battle the US has been in since WW2 against a nation whose navy consists of speedboats.
On the subject of supply or logistics, the US military basically lacks any of the transport/airlift capacity they had 25 years ago. That, to my mind, qualifies as a supply or logistics failure, given that such a capacity would be a basic necessity for any actual Army engagement in a conflict.
The US military’s greatest weakness is the inability to hold objectives
Just gonna add here that yes, the US military does have trouble with the basic requirements of a military. This does not help your argument.