No.
Rome fell (among many reasons) due to overextension beyond their ability to maintain and concentrate sufficient forces, alongside military invasion by multiple groups over many years.
Germany was going to fall in one of two ways, either economic collapse from a grossly unaffordable military buildup that was on track to bankrupt them, or getting into wars with powerful countries in order to help pay for said military buildup. They went with option B.
The US has no issues concentrating and deploying sufficient military force to defend itself, and isn’t spending anywhere near enough on defense to make it unaffordable, spending about 13% of our budget on defense. (compared to over 100% [edit: of annual income, I mixed my figures inappropriately here] for the Germans) Most of our deficit comes from domestic expenses like health care.
Maybe a better comparison is the loss of the Roman Republic to the Roman Empire
13% of the budget goes to the military? In the US? And medical expenditure is the driver of the government budget? Please take me to your timeline. Cause that isn’t this one.
You’re probably operating from outdated information, we don’t have the same budget we had 10-20 years ago. Here ya go:
https://fiscaldata.treasury.gov/americas-finance-guide/federal-spending/