I need a list of song titles for marching music.

Here's the deal...my 85-year-old uncle and his wife live in a retirement community with a large recreation hall. For exercise they have a drill team that marches in precision drill routines. I saw them several years ago, a little 90-year-old lady has a whistle to give commands on when to do the various turns, etc. It really is quite a work-out.

I'm thinking Susa marches. Or any march that Americans in that age range would be familiar with. Any suggestions?