it's this    you wouldn't last probably 2 months, maybe less, at ukraine intensity. you cannot count your total (land) army personnel at around 80k because that includes all sorts of staff and reservists.  you have functional, frontline-ready combat soldiers at less than 20k. even worse is the fact that you have at most about 220 artillery pieces but this includes all sorts of crap.  on an eastern front scenario against russia you would last maybe a month or two, generously speaking. you would be overwhelmed early on and blasted off the fields from their artillery and would take on very heavy casualties.  you can rebuild your army but that would take years even if you started yesterday. let alone your mostly dead armaments industry, munitions, planes, vehicles etc.
United States