Back in the day, we had A-10s at Westfield, MA and Bradley CT. We also had F-16s at Syracuse, NY and Burlington, VT. Not to mention refuelers at Pease, NH and Bangor ME and the Eagles at the Cape.
All of these planes would play in the Yankee MOA (Military Operating Area) that went IIRC from Surface to 15,000 feet roughly centered over Woodstock, NH. Because we don't have the huge ranges like they do out west, with the two ranges used being Fort Drum, NY and Indiantown Gap PA - both of these being pretty small, our planes would use captive munitions and train in the larger MOA. Since the ranges were small and were always being used by everyone, it was always much easier to just use the MOA and deconflict East / West if need be and still have a huge area to work. Because they weren't really dropping / expending ordnance, the pilots could simulate just about any attack scenario they desired and would plan run ins and egress that would make sense, and not be dictated by silly laws about carrying live bombs over populated areas. As the scheduler, I was able to get the Westfield unit huge amounts of time in the MOA, which is why you always saw Warthogs there, typically 2 hours in the morning and two in the afternoon.
Once BRAC (Base Realignment and Closure) hit in 2009 (?), the Northeast's jet population went way down. Westfield lost its beloved A-10 and got stuck with the Eagle from the Cape, and now flies off the coast so they can go fast and not bother cows or sheeple. The cape lost all its planes and is now an Intelligence Wing. Bradley lost its Warthogs and went to cargo planes, and then some Intel planes. Syracuse went to drones. Burlington kept its F-16s but had no one to play with anymore, which doesn't matter since they now have F-35s and I know nothing about them.
The flares were designed for training and a short burn. The pilots weren't supposed to pickle them below a certain altitude, 250' IIRC? There was also some "environmentally friendly" chaff that they'd dispense that were biodegradeable. These allowed the pilots to actively get in the habit of dispensing countermeasures instead of just saying "junk" to simulate.