Russia established a space force in 1992. China stood one up in 2016. Both have tested offensive weapons in orbit.

Comes from the predecessor USAF squadron.

There are deltas and squadrons in the USSF that mirror NRO structures, and which are not widely publicized. They have insignia, but you don’t see it often.

Any kind of operational training squadron in the USAF or USSF is a “combat training squadron”