The military force that guarded an isolationist Earth after it left the Federation following the Burn, commanded by Captain Ndoye when the USS Discovery returned home in 3189.
The United Earth Defence Force protects Earth in the thirty-second century, when the planet has withdrawn from the Federation and closed itself off behind a defensive shield, admitting no visitors.
In the Discovery episode People of Earth, Captain Ndoye's ships challenge Discovery on arrival and send inspectors aboard, among them Adira Tal. Earth has suffered years of raids for its dilithium by a group led by a man called Wen. Burnham and Book expose the raiders as humans from the colony on Titan, cut off and desperate since the Burn, and Saru brings the two sides to talk.
Ndoye returns in the fourth season, by then a general, when United Earth takes part in the response to the Dark Matter Anomaly. Earth rejoins the Federation in Coming Home.