The battle dealt a killing blow to the Commonwealth Minutemen as they were, with the movement too few in number and rife with distrust to hold together. Those that remained who did not arrive to defend Quincy faded away.
The Gunners dispatched a further detail to finish off Preston's group. They killed several more of them at Jamaica Plain, but were unable to stop the rest of them escaping. Preston's continued attempts to protect his group of survivors eventually took them to the ruins of Lexington. Feral ghouls whittled their number down to eight, before Jared's raider band, lead by Gristle, killed a further three and forced the five survivors to take shelter in Concord's Museum of Freedom.
Clint was promoted to commander of Quincy by Captain Wes for his actions. Determined that the town would not be taken in the same way it had fallen to the Gunners, he fortified the highway, set up a radio tower and captured two sets of power armor in order to defend it.
If the Sole Survivor visits Quincy, they will see the armor being worn by Clint himself, and the other set by Tessa, who wields Tessa's Fist (a modified power armor piece). If the Survivor so chooses, the town can be attacked and Clint, Baker and Tessa can all be killed to avenge the Minutemen.