Minutemen Empire

The Minutemen Empire, lead by General Dave, is a major faction with control over the majority of the former Commonwealth of Massachusetts, with the only settlements outside of their banner being Diamond City, Goodneighbor, and Pleasure Island.

Events canon to Fallout 4
The Minutemen began as a civilian militia founded by various settlements to protect themselves against the numerous threats in the Commonwealth, everything from raiders and gunners to super mutants and the wildlife. They first gained recognition when they defended Diamond City against a super mutant attack in the year 2180. Afterwards, the Minutemen gathered resources and assumed control of Fort Independence, also known as "The Castle", and used it as their main base of operations. From there, they erected a radio tower and began to broadcast Radio Freedom to better inform Minutemen about anyone who needed help.

However, in 2240, Mirelurks (including a Mirelurk Queen) attacked the Castle and drove the Minutemen out, proceeding to use the Castle as a nesting ground. General McGann, who thought it was a super mutant attack, locked himself deep inside the armory and laid down a myriad of defenses, consisting of a turret, numerous landmines, and S.A.R.G.E, a sentry bot.

General Becker was soon elected to take the place of General McGann, but he was killed some time afterwards. The Minutemen fell to internal strife, as nobody could agree on who would succeed Becker, and they could not communicate well due to the loss of the Castle. This came to a head at the Quincy Massacre, where only one Minutemen group, lead by Colonel Ezra Hollis, arrived to defend Quincy from the Gunners. The Minutemen effectively ceased to exist, with the exception of Preston Garvey and his band of survivors, who traveled from Quincy to Concord in an attempt to find safety.

Events canon to General Dave
This shall be left to the other contributors. I'm tired.