Drum Corps International: What does it look like?

In drum corps (pronounced "core"), not only are the participants playing at a high degree of ability, but they're also marching at a high degree of ability. Check out some of the following clips and links, and appreciate the amount of work they put into these performances!

Unfortunately, due to copyright laws, only snippets of shows are typically available on YouTube.

Phantom Regiment - "Spartacus" (2008 - World Champions)
Simulated violence
https://www.youtube.com/watch?v=f0cNHm2gCgk

Cavaliers - "Secret Society" (2013)
https://www.youtube.com/watch?v=DrwlQpUHMs0

Madison Scouts - "Corps of Brothers - 75 Years of Survival" (2013)
This is a rehearsal run in 2 parts, with lots of drum cam angles since it's a Vic Firth sponsored video. (Vic Firth is a percussion company.)
Part 1:

Part 2 includes simulated warfare:
https://www.youtube.com/watch?v=VKJJgOQzu9Q

Bluecoats - "Brave New World" (2011)

Santa Clara Vanguard - "Les Miserables" (2013)

Full show: https://www.youtube.com/watch?v=-SDROg9jXR4

Star of Indiana - "Roman Images" (1991)