In "Fallout 4" which faction is not present in the game?

The Enclave is not present in Fallout 4 as a faction because the game is set in the Commonwealth, which is located on the east coast of the United States, whereas the Enclave is primarily situated on the west coast. This faction is more prominently featured in previous Fallout games, such as Fallout 2 and Fallout 3, where players can encounter and interact with its members.