Massacre of the CPG

The Commonwealth Provisional Government, or CPG, was an attempt by multiple towns to form a government within The Commonwealth.

Accounts of what exactly happened to it vary. According to Nick Valentine, when representatives of the towns met to discuss it, an Institute synth appeared and killed all of them, immediately ending all further attempts at the prospect.

However, Father and the Institute seem to tell a different story: Not only were the Institute originally responsible for the formation of the CPG in the first place, they had been trying to get it together for four whole years. According to them, the CPG was already quickly falling apart due to factional infighting and political squabbling, and the apparently malfunctioning synth was simply the last nail in the coffin for a government that was doomed from the start. This is further backed up by holotapes left over from before Father's tenure as director.

Appearances
the Commonwealth Provisional Government is mentioned only in Fallout 4.