This is a great overview of the brass band movement - they make a reference to drum and bugle corps near the end of the video. Brass bands are down in numbers as well, but it's still a really neat tradition and genre. A different horse for a different course, but I think a lot of drum corps fans can relate to the brass band movement -- this is a great intro if you are not familiar with brass bands - followed up by the youtube video: Extreme Make-over - Krohnengen Brass Band - NM 2018
Check it out!