Sounds like a fun march, but it seems to have some more dissonant parts as well, but the lower middle voices were not easy to hear. A band with some level should be able to appreciate it, and played at full volume this can be a powerful extension of their repertoire. I like how you've taken the standard march that we know from Sousa, and bent it a bit. I also like that you didn't simply repeat the opening section, but chose a quiet resolution.
That one's great and I enjoyed it a lot! - you are getting a pretty realistic sound to what you would actually hear if the band was playing live and outdoors, where Marching Bands belong!!
Thanks for posting.