Marching bands are a big deal in Arizona, at least among my relatives who live in Phoenix. Arizona HS have these bands and the compete statewide. The coordination is amazing. These things have their roots in military formation and you can see why it would have been needed. The many kids know what to do. Their diverse roles lead to a common desirable outcome.
We attended the 2017 Arizona State Marching Band Championships because Chrissy’s sister Diane’s daughter, Maleah, was a participant. She plays the euphonium, sort of like a little tuba.
The competition was held at Arizona State (ASU) Sun Devil Stadium. I got a few pictures to show what it looks like.