2256


Events

By starship or station 

 May
 The USS Shenzhou visits the Crepusculan homeworld and saves them from a drought. ()
 The Shenzhou is called to a binary star system to investigate damage done to an interstellar relay by T'Kuvma's faction. First Officer Michael Burnham attempts a mutiny against Captain Philippa Georgiou in the hopes of defusing the crisis. ()
 The Battle of the Binary Stars occurs between Starfleet and Klingon forces; Captain Georgiou and T'Kuvma are killed. The  begins. ()
 Michael Burnham is found guilty of mutiny, stripped of her rank, and sentenced to life imprisonment. ()
 The Torchbearer Voq attempts to continue T'Kuvma's ideology, but is largely sidelined by the Klingon Empire.

 June
 The USS Buran is ambushed and all hands except for Captain Gabriel Lorca are lost. Unknown to anyone at the time, Lorca has been replaced by his mirror universe counterpart. ()

 
 After being diverted from transfer to the Tellun penal colony, Michael Burnham and three other prisoners stay aboard the USS Discovery until their shuttle is fixed. While on board, Burnham learns about what the ship and her captain, Gabriel Lorca, are doing in their fight against the Klingons. Burnham is sent on an away mission with Sylvia Tilly and Paul Stamets to investigate the USS Glenn. ()
 Captain Lorca has the Glenn scuttled, but recovers the tardigrade "Ripper" still on board and uses it to dramatically improve the Discoverys spore drive. ()
 Michael Burnham joins the crew of the Discovery. ()
 With the aid of the spore drive, Captain Lorca leads the Discovery to victory, destroying multiple Klingon ships during their attack on Corvan II. ()
 Voq is overthrown by  of the House of Kor, who assumes leadership of T'Kuvma's Klingons. Voq is abandoned aboard the wreck of the USS Shenzhou but is rescued by L'Rell. ()
 Captain Lorca is captured by Klingons while returning from a conference. During his captivity, he encounters Starfleet Lieutenant  and Harcourt Fenton Mudd. Lorca and Tyler escape, leading Mudd behind for helping the Klingons and are beamed aboard the Discovery after it arrives to find Lorca. ()
 After finding that using the spore drive causes "Ripper" extreme pain, Michael Burnham releases the tardigrade from the Discovery. Its role is taken by Lieutenant Stamets. ()
 Ambassador Sarek departs on a diplomatic mission, a meeting with a supposed dissenting Klingon faction. however his ship is bombed by a Logic extremist, stranding him inside a nebula until he can be retrieved in an unauthorized rescue mission by Michael Burnham. Katrina Cornwell goes in Sarek's place to meet with the Klingons, but is captured by them when the overture turns out to be a trap. ()
 Harry Mudd uses a time crystal to trap Discovery inside a time loop in a attempt to figure out the starship's secret and sell the ship to the Klingons. Paul Stamets is able to exist outside of the loop and figures out his plan. In the end, Mudd is handed over to his fiance Stella and her father. ()

 A failed test of the USS Glenns experimental spore drive using a captured  causes the crew to be mutilated. A group of Klingons try to take advantage of the disabled ship but are all killed by the tardigrade on board. ()

 The USS Gagarin is ambushed simultaneously while patrolling its sector along with the two other Starfleet vessels in the area; the  and . The Hoover and Muroc are destroyed, closely followed by the Gagarin after its warp drive is disabled. The USS Discovery responds to the Gagarins distress call but is unable to stop the Klingons destroying the vessel with all hands. ()

Other events 
 Leonard McCoy ends his relationship with (the future) Nancy Crater. ()
 The Klingon reactionary leader T'Kuvma begins assembling like-minded Klingons into a nationalist, anti-Federation movement. ()
 Starfleet begins conceptualizing the spore drive, installing it on two prototype vessels, the USS Glenn and the USS Discovery. ()

Notes 
 According to the , Christopher Pike finished his first five-year mission in this year.

Appendices

Episodes

External link 

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Mirror universe timeline