“surplus to requirements.”
__________
You work for Forbes or Bloomberg?
No, just a lifetime of interest in these matters.
You can look up US stocks of stuff and figure whats “active” and in reserve. Like plain old wiki.
https://en.m.wiki2.org/wiki/List_of_equipment_of_the_United_States_Army
If you dont like wiki you can track the cite back to the source, which is normally a compilation from some source like
“The Military Balance” from https://en.m.wikipedia.org/wiki/International_Institute_for_Strategic_Studios
or, https://en.m.wikipedia.org/wiki/Janes_Information_Services