A lot of our capabilities is simply being present (overseas bases) and being able to move to a theater of war (logistics). We are unlikely to ever fight a mean

A lot of our capabilities is simply being present (overseas bases) and being able to move to a theater of war (logistics). We are unlikely to ever fight a meaningful war with either Canada or Mexico, at least there are no signs of that ever being a possibility in my lifetime. Our adversaries are pretty much all overseas, and I’m pretty sure the Coast Guard could single-handedly defend against the threat posed by a possible Cuban invasion. So we have to spend on logistics and overseas bases and support infrastructure for those bases, in addition to our nuclear arsenal, satellites, the War against rust, communications technology, aircraft carriers, aircraft, submarines and artillery and all manner of other things which are intended to keep us in the lead in terms of capabilities, effectiveness and deadliness.