Just thought of this while posting somewhere else. Lot of posters like myself marched in circuits other than DCA. Might as well get the names, years and history of these circuits while we can.
Have more info at home and will fill in when I can but to start things off.
ICA (International Corps Assoc): Early-mid 80s, Empire Statesmen started off here along with rebuilding (again) Westshoremen.
RCA (Red Carpet Assoc): late 60s to late 70s, Ron Allard has the championship records on his site (Westshore, Guelph, Rockets, Erie T-Birds were the biggies and MBI every now and then)
???? - late 70s: have Hershey Chocolatier CD with this listed, will dig up the CD for the circuit(?) name
Interstate Circuit - will have to dig for more info
Eastern States: around in the early 50s, PA and NJ mostly apparently
Northeastern Circuit: early 60s until ????
marched RCA and ICA along with DCA