alt Hacker News>The US military isn't that scary; the evidence to date is that it's ability to destroy counties ends somewhere around Iran's strength.
The US military's "ability" is very contextual - for instance, the US could easily obliterate Iran with a MIRV or two, but for various geopolitical reasons they choose not to. Likewise, the US navy is of limited use against Iran due to the literal mountain range between their only coastline and the bulk of their landmass (and population), much of which is quite mountainous.
If we're assuming a nuclear war then the US military is comparable to a bunch of other militarys. And the "various geopolitical reasons", on examination, includes possible outcomes like the US being pummelled through the stone age and out the other side, or more mild ones like New York being flattened. It isn't really much of an option in any foreseeable scenario where their goose isn't already being cooked.
So yes they are scary, but they aren't that scary relatively speaking. We've left the brief era where the US could exert military supremacy over the globe and it is ambiguous who has the "best" military among the major powers [0]. Militarys are generally a tool for self-destruction anyway so the term is a bit ambiguous, most of the big empires fall because they get too enamoured with military solutions over economic and diplomatic excellence.
[0] Does the US military even perform to spec? There is clearly a lot of corruption and I've seen it described on HN as a disguised welfare program.