I think you may be confusing the Indian Guard Reserve with the Indiana National Guard. From the wiki page:
"The Indiana Guard Reserve serves under the exclusive authority of the governor of the State of Indiana"
California has a similar group, it is separate from the National Guard: Cal Guard | Cal Guard
Right, I should have added that. I think these state run groups (separate from the National Guard) can utilize military/federal frequencies, but they also seem to have some FCC licenses. I recall the California Guard had a few also.
Looking at the @west-pac link, it looks like an itinerant repeater probably for local stuff.
I think you may be confusing the Indian Guard Reserve with the Indiana National Guard. From the wiki page:
"The Indiana Guard Reserve serves under the exclusive authority of the governor of the State of Indiana"
California has a similar group, it is separate from the National Guard: Cal Guard | Cal Guard
I was an NCO in charge of communications in the Massachusetts State Guard, mainly because I was the only person with a license above Technician.
We used military-issued radios, whether “green” or EFJ, when we were with the National Guard. Otherwise we had a MOU with a statewide public safety association (a member here, come to think of it) who graciously allowed us to use two of their VHF simplex frequencies.
The Indiana Guard Reserve is separate from the National Guard, and are under the sole authority of the state Adjutant General. They can supplement the National Guard, however. Other states have similar units but they're usually called state guard or state defense force.