This cache was placed for C-Mass Geofest 2019
The Blue Army - fans of Aerosmith. Back in the mid-70s, the phrase referred to the masses of Aerosmith fans who came to concerts decked out in denim - jeans and jackets in particular. It was also meant to refer to their blue collar fan base. The term is still used, but Aerosmith also now has an official fan club called Aero Force One.
This cache is found as you head downstream from Lake Siog to East Brimfield Lake via the East Branch of the Quinebaug River.