I never did marching band.
. (https://marching.musicforall.org/directorinfo/)
A: up to 600 students
AA: 601-1250 students
AAA: 1251-1750 students
AAAA: 1751-2250 students
AAAAA: 2250 + students
History.
Percussion and wind instruments were used on the battlefield since ancient times.
An Iron Age example would be the carnyx.
The development of the military band from such predecessors was a gradual development of the medieval and early modern period. 
A prototype of the Ottoman military band may be mentioned in the
join on organ. Kuerth played classical piano and knew Gary Walker at high school, where they both played percussion in the marching band. According to Keurth, "I never considered us a 'garage band'. Yes, we originally rehearsed in Garey's basement, but he did not even have a real garage. One of the first things Chuck did was to rent us a building for us to rehearse in (our rehearsal hall). We never played in a garage, except once at my house. We were