I agree on not bringing in the active military. In this case, the national guard units he was calling up were federalized state NGs. There is no state guard for DC, it is a federal district.
I’ve seen the NG used in a city (Newark). Do you know whom their back up is if needed. In 67 I believe the active military had to be called up to quell the Detroit riot.
Thanks for the explanation. That makes so much more sense.