Archer's Rebellion was a rebellion against the Terran Empire led by the clone of Jonathan Archer created by Empress Hoshi Sato. The rebellion wore the uniforms of the 23rd century, primary universe Federation Starfleet.
The rebellion began in 2157 after Archer escaped from Imperial custody. With the help of Archer's friend Charles Tucker the rebellion was able to steal the ISS Nobunaga, a highly advanced starship based on the USS Defiant. (ENT - Mirror Universe short story: "Nobunaga")