It is NOT normal, and was very poignant for what DJT was doing as POTUS/CIC, then as CIC, and right now. I’ve seen analysis of the military hats and insignias of the dozen+ in total behind him. The military was behind him JUST for that minute (less, I think) while he said emphatically “Giving it back to YOU, The People”, the last two words referring to the original Republic.
Normal inaug: transition from one admin to another, or one party to another.
Special Meaning: transition from wash DC and giving it back to YOU, THE PEOPLE.
Well, how did Trump know there was a problem per se with the Establishment when he hadn’t even started working in DC? I know Trump is very respectful of the military which may be why he had them included in the ceremony, other than that, I’m not seeing this grand plan.