The US was sometimes able to mobilize quickly in response to extraordinary circumstances (WWII production being an example), but that isn't really our default state, and requires consensus-building rather than orders from on high. But sadly our ability to do so even in extraordinary circumstances has atrophied.

But as a European, the US's military footing doesn't feel alien to us at all. They're essentially the modernization of the British Empire, in that their single greatest "weapon" is force projection, rather than the million-man-armies of the East. We don't necessarily identify with it anymore, but it still feels more familiar than alien.