That interval grouping represents the advance (proceed in forward direction) command

The major intervals are eighths beginning with a tonic pickup note:
1{command; moderate advance}| |:3351 3351 | 3351 3351 | 3351 3351 | 3351 3351 |{and) 3333 5__3 |{to repeat} 1111 3__1:|%%%| then
| |:{and} 3333 5__3 |(end of command) 1515 1___ :| |%

The trumpeteers in the English army rode tandem to the commander. The commander's orders were translated to a musical progresion that represented it. The trumpeteer's function was to broadcast the command to his flanks.

Many armies used this form of communication to the troops. The broadcast was typically 16 or 32 bars.
Just something I remember from a history chapter in music theory. Surely most of us have at one time or another heard the charge sequence: 1|3531 1 3531 1 3531 | 3333 5___3

I believe I recall this trivia correctly, but don't hold your troops to it.
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As far as H.S., besides a piece of paper to wipe the butt with, you didn't miss a whole lot. These days, GED's are just as good. It's nothing as good as you might have thought you missed.

"When I think back on all the crap I learned in High School,
It's a wonder I can think at all,
and though my lack of education hasn't hurt me none,
I can read the writing on the wall. "

Kodachrome by Paul Simon (and his Nikon)

May no one ever take our Kodachrome away.

(A simple 2 verse multi meaningful 'between the lines' song about the depiction of things not always being what they appear to be, but just as well, better off it be that way, we are no fools and all know what the time really is anyway, so we may as well have everything appear to be great, at least we can in knowing the reality of things, create a nice view of it all. Its closest resulting transgression is: It's going to be however it's going to be. No sense in having an ulcer over it, enjoy life.
Paul Simon recorded a great deal of his work at the sound studio I worked at (now known as Ground Zero Rec.). Paul is an absolute musical genius. I'm thankful to have his complete musical history in my library.