The symbol of the Terran Empire.
- 2063
- Zefram Cochrane launched Earth's first warp vessel. The Vulcans made first contact with the Terran people. During first contact Cochrane killed the Vulcan captain and his fellow Terrans stormed the Vulcan ship.
- Late 21st century to Mid-22nd century
- Sometime between 2063 and 2155, the Terran Empire conquered the Vulcans, Andorians, Tellarites, Denobulans, and the Orions.
- 2155
- The ISS Enterprise (NX-01) discovered the USS Defiant (NCC-1764). After a brief power struggle onboard the Defiant, Hoshi Sato takes command and declares herself Empress.
- It's not known if Hoshi became Empress but given the advanced technology of the Defiant it's almost certain she became Empress in fact as well as in name -- though it is certainly possibly she may have suffered the same sort of treachery she had just inflicted on Archer, or that the Defiant may have malfunctioned, or any other series of events which may have prevented it.
- 2267
- A transporter accident brings several personnel from the primary universe to the mirror universe. The primary James T. Kirk encourages the mirror Spock to start a revolution.
- The Empire of 2267 did not seem to have been significantly more advanced than the Federation, as one might expect if it had a hundred-year head start with the Defiant's technology, nor did the people of the mirror universe appear to be aware of the existence of the Federation's universe prior to Kirk's transposition, and in fact, according to the mirror Kira Nerys, it was the Kirk incursion which made it known. This may be explained by one of Mirror Archer's last decisions before his death: to erase the Defiant's historical database. Of course if the "Defiant"'s superiority was the only thing keeping Hoshi (or whomever) in power, not to mention keeping the rebels at bay, it would have been very difficult to reverse engineer it to advance general trechnology in any meaningful way while it was in use. Also, the mirror "Enterprise" could have been an older Constitution class ship and the most cutting edge ship at that time might have been more advanced. It goes to figure that the "Definat" would have been the most revered namesake and flagship in the mirror universe since it is the ship that started the new order. There is also no proof that the mirror universe visited in 2155 is the exact same one visited in 2267. It wasn't until Kirk returned to this universe that any mirror universe would have a way to pinpoint another specific alternate universe and vice/versa.
- Late 23rd century-Early 24th century
- Sometime between 2267 and 2370, Spock becomes commander-in-chief of the Terran Empire and implements several major reforms, turning the Empire into a more peaceful and less aggressive power. Prior to the full enactment of these reforms, Terran Empire forces occupy Bajor. Spock's reforms leave the Empire unprepared to fight against the Klingon-Cardassian Alliance. The Alliance conquers the entire Terran Empire, enslaving the Terrans and Vulcans.
- 2366
- Benjamin and Jennifer Sisko separate.
- 2370
- Julian Bashir and Kira Nerys become the first people from the primary universe to cross over to the mirror universe in one hundred and three years. Quark is executed. The primary Doctor Bashir kills Odo.
- 2371
- The Terran Rebellion begins. Benjamin Sisko is killed when his freighter is destroyed. Garak executes Rom. Miles O'Brien becomes leader of the Rebellion.
- 2372
- The Rebellion takes Terok Nor. A mirror universe version of the Defiant is constructed from schematics from the primary universe. It helps the rebels to remain in control of Terok Nor. Intendant Kira Nerys kills Nog and Jennifer Sisko.
- 2374
- The mirror universe versions of Bareil Antos and Kira Nerys cross over to the primary universe to steal an orb. The Intendant hoped the Orb of Prophecy and Change would unite the mirror Bajorans against the Alliance.
- 2375
- Jadzia is killed in a skirmish with the Alliance. Kira kills Brunt. Garak is killed by an ulcartic virus. Ezri Tigan joins the Rebellion. The Rebellion captures Regent Worf.