It's an old military dream; Ithacus [0] was a 1966 concept for a vertical take-off, vertical landing troop transport rocket that could put 1200 soldiers plus materiel anywhere in the world in an hour. Issues that others have brought up here (like the vehicle being mistaken for a nuclear missile) were brought up then, and the obvious flaws killed the project.
As [0] points out, and as I vividly recall from the antiquated books of my childhood, a similar concept was prominent in the 1979 Usborne Book of the Future. The idea of being able to put boots on the ground anywhere within an hour is probably still a military dream somewhere, although I don't think US doctrine has a place for that right now, since achieving air supremacy over the theater, a prerequisite to boots on the ground, would probably take longer than an hour.
Don’t need air supremacy if the boots are attached to ground drones. We’re not far off from a starship equivalent deploying a cloud of ground and air drones, some of which could help effect the air supremacy required. Like rapid dragon but more variations of deployed materiel and…a lot more rapid.
You do want control of the airspace if you want the operation to be affordable, otherwise, you're pouring resources into a drone grinder (to mix metaphors).
As [0] points out, and as I vividly recall from the antiquated books of my childhood, a similar concept was prominent in the 1979 Usborne Book of the Future. The idea of being able to put boots on the ground anywhere within an hour is probably still a military dream somewhere, although I don't think US doctrine has a place for that right now, since achieving air supremacy over the theater, a prerequisite to boots on the ground, would probably take longer than an hour.
[0] https://blog.firedrake.org/archive/2015/12/Ithacus_and_SUSTA...