The COUGAR SALVO series of exercises are brigade concentrations which descend from the old Pacific Mil Area HQ (effectively, now 39 CBG HQ) spring break "gun camps". Budget permitting, they occur annually during March spring break and are usually held in WA state (Ft Lewis and its attached Yakima Firing Center). Depending on what is mandated in a particular year, the training may be concentrated or dispersed, live or dry (firing), and have different proportions of time devoted to all-arms vs branch-specific training.
(One of the original purposes of "gun camp" was to go somewhere with ranges suitable for more than just small arms in order to complete the qualifications for arty, engr, ADP gunners, MG, etc).