Help:Sandbox
Events in bold refer to major incidents or the beginning of significant eras in the timeline.
Pre-Common Era
| YEAR | EVENT | REF |
| ~11 billion years ago | Biological life appeared in the Milky Way Galaxy. | Guide |
| ~8 billion years ago | DNA-based life first evident in the Milky Way Galaxy. | Guide |
| ~7.5 billion years ago | A time-traveling culture appears to have colonized on planet 522-IV. | Guide |
| ~4.5 billion years ago | Humanoids first evolve in the Milky Way galaxy. | Guide |
| ~700,000 years ago | The Pnaii is the last FTL culture to have visited and settled (temporarily) the area of space around Earth. | Guide |
20th and 21st Centuries
| YEAR | EVENT | REF |
| 1992 | The Eugenic supermen take over most of South & Southeast Asia. | Guide |
| 1996 | Khan Noonian Singh and several of his followers escape Earth, as the Angkor fortress is captured. | Guide |
| 2015 | The United Earth Government (UEG) assumes political administration for the majority of the planet. | Guide |
| 2030 | Zephram Cochrane is born. | Guide |
| 2032 | Ares III, the sixth successful mission to Mars, occurs. | Guide |
| 2035 | The AFP-1 prototype is lost in a disaster. | Guide |
| 2036-2039 | The first crewed probeships attempt flight out of the Sol system. | Guide |
| 2045 | Five spaceframes of the Columbus series are ready for flight. | Guide |
| 2045 | (September) UNSS Columbus’ mission delayed to a fueling accident. | Guide |
| 2046 | (January 21) UNSS Nautilus boosts out of Earth orbit for Tau Ceti. | Guide |
| 2046 | (February 21, speculative) UNSS Icarus launches for Alpha Centauri. | Guide |
| 2046 | (March 21, speculative) UNSS Hector launches for Arcturus. | Guide |
| 2046 | (April 21, speculative) UNSS Prometheus launches for Epsilon Indi. | Guide |
| 2046 | (May 5) UNSS Nautilus is damaged after hitting an object. | Guide |
| 2049 | The ’East’ orders 5 Keldysh class cruisers built, four which are ready by 2053, in time for World War III. | Guide |
| (before) 2053 | UNSS Columbus is appropriated by the United States of America. | Guide |
| 2053 | Columbus is destroyed by an Econ kinetic-kill missile. | Guide |
| 2053 | World War III begins. | Guide |
| 2055 | Planned FTL experiments by the United States Air Force are canceled. | Guide |
| 2058 | The United States of America is building the first transorbital warships. | Guide |
| 2060 | The White Sands Spaceport is closed and heavy-lift capability ceases. | Guide |
| 2061 | First test of the continuum distortion superimpellor. | Guide |
| 2062 | The first Liberty class cruiser attains nominal drive capacity. | Guide |
| 2063 | (April 4) Zephram Cochrane breaks the light 'barrier.' | Guide |
| 2063 | (April 4) Vulcan scouts make first contact with Earth. | Guide |
| 2064 | The first Liberty class cruiser has its armament installation completed. | Guide |
| 2064 | Six new Liberty class hulls are orbiting Earth. | Guide |
| 2064 | SS Defiant & SS Valiant depart respectively for the upper & lower edges of the galactic disk. | Guide |
| 2064 | (November 5) The Phoenix warp engines are recovered from orbit. | Guide |
| 2064 | The ex-Seneca is towed to the (now-empty) Valiant berth, for transformation into the Bonaventure. | Guide |
| 2064 | (October) Jules Verne has first successful sublight test flight. | Guide |
| 2065 | The warp surveyor SS Leif Eirickson departs for 61 Cygni. (speculative year; assumes slightly faster than 1c) | Guide |
| 2065 | The Sparon-DeSota Treaty requires all armed spacecraft within 5,000 AUs of Sol to be crewed internationally. | Guide |
| 2065 | The Phoenix is retired. | Guide |
| 2065 | SS Defiant is believed to have destroyed by the Barrier Alliance in this year. | Guide |
| 2065 | (August 22) Construction starts on SS Conestoga, Earth’s first colonizer. | Guide |
| 2065 | (December 14) Jules Verne has first warp run outside Uranus orbit, achieving w1.02. | Guide |
| 2066-2069 | The Liberty class system defense cruisers are the primary line of Sol system defense. | Guide |
| 2066-2069 | Full pre-WWIII industrial capacity is achieved by Earth. | Guide |
| 2067 | (early March) SS Conestoga christened. | Guide |
| 2067 | (April 4) On the 4th anniversary of Cochrane’s flight, the SS Conestoga launches for Eta Cassiopeiae III, later to be named Terra Nova. | Guide |
| 2069 | The United Earth Defense Pact (UEDP) is formed, performing as the international space defense organization of Earth until 2089. | Guide |
| 2070 | 51 Liberty class cruisers are in Sol space. | Guide |
| 2071 | SS Spirit, the next Conestoga colonizer, is completed. | Guide |
| 2073 | SS Leif Erickson makes contact with the Tellarites on 61 Cygni V, days before a Tellarite explorer/merchantman is intercepted by a task force in the vicinity of Neptune. | Guide |
| 2073 | By this year, more than 50 warp ships had departed the Sol system. | Guide |
| 2073 | SS Valiant encounters the galactic barrier and self-destructs. | Guide |
| 2073 | The Verne class cruiser, the first series-produced vessel, enters United Earth service. | Guide |
| 2075 | The 18th Verne class cruiser is built, with 16 interstellar missions for the class currently underway. | Guide |
| 2076 | (late year) SS Conestoga arrives in orbit of Terra Nova. | Guide |
| 2077 | USS Mercury & USS Banshee are lost to hostile actions by unknown forces (the first so lost). | Guide |
| 2080 | The Jovian moons of Ganymede and Europa have become important industrial and military assets. | Guide |
| 2081 | The colonists of Terra Nova, determined to be independent, threaten any future attempts by Earth to further settle the planet. | Guide |
| 2081 | Permanent human presences are established on Ganymede and Europa. | Guide |
| 2084 | The SS Leif Eirickson’s message of contact with the Tellarites reaches Earth. | Guide |
| 2086 | USS Fletcher explodes in a warp drive failure, ending the tri-nacelle arrangement and resulting in the Verne class being restricted (and re-designated) in a system-defense role. | Guide |
| 2086 | SS Ascender, the third Conestoga colonizer, reaches and settles 36 Ophiuci III. | Guide |
| 2089 | The United Earth Defense Pact is reformed as the United Earth Star Fleet (UESF); the new exploration mission is handled by the UESF's United Earth Space Probe Agency (UESPA). | Guide |
| 2089 | The Verne class cruisers have operational control turned over to the UESF. | Guide |
| 2089 | USS Scythe accidentally opens fire on USS Hammer & USS Emnity. | Guide |
| 2090 | (speculative) Verne class destroyers removed from active duty & delegated to training. | Guide |
| 2090-2130 | Messier class ships are used to explore outside the Sol system. | Guide |
| 2091 | The UESF Academy is founded, with Liberty class cruisers available as training vessels. | Guide |
| 2091 | The re-directed SS Spirit reaches and settles on Alpha Centauri A-II. | Guide |
| 2091 | The first major upgrade of the Messier class’ warp engines occurs. | Guide |
| 2091 | The original Hercules (Y-100) is fielded. | Guide |
| 2093 | By this year, six extra-solar colonies had been established. | Guide |
| 2095 | (speculative) Verne class decommissioned. | Guide |
| 2096-2098 | The first series of confrontations with the Kzintis. | Guide |
| 2096-2099 | The Hercules model Y-200 is bought by the UESF. | Guide |
| 2098 | The fourth Kzinti invasion fleet retreats. | Guide |
| 2099 | Type-III cargo modules are introduced by the Terran mining industry. | Guide |
22nd Century
| YEAR | EVENT | REF |
| 2100 | Twenty-five Messier class vessels have been constructed, by this year. | Guide |
| 2103 | (speculative) The Hercules model FY-500 is introduced. | Guide |
| 2112 | Roanoke-Gemini subclass is purchased with plasma cannons. | Guide |
| 2115 | The second major upgrade of the Messier class’ warp engines occurs. | Guide |
| 2115 | Zephram Cochrane’s team begins development of a new series of warp engine. | Guide |
| 2119 | Zephram Cochrane leaves Alpha Centauri for deep space and is never seen again. | Guide |
| 2120-2129 | The first mutual defense pacts between Alpha Centauri and resident Terran colonists are signed. | Guide |
| 2123 | DY-500s are being produced in large numbers. | Guide |
| 2125 | (speculative) The Phoenix warp engines are recovered and preserved at the Smithsonian. | Guide |
| 2125 | The Hercules model FY-500 is discontinued. | Guide |
| 2132 | The first offensive actions by the Romulans begin with an attack on the USS Balboa. | Guide |
| 2132-2156 | Phase I of the Romulan War: Romulan attacks against Terran (and others’) territories are conducted. | Guide |
| 2134 | The UESF calls for a new survey ship class. | Guide |
| 2135 | The third (and final) major upgrade of the Messier class’ warp engines occurs. | Guide |
| 2136 | Four parallel development lines emerge from the original Cochrane team. | Guide |
| 2140 | (October 5) The Daedalus is destroyed in a drive chain explosion at warp 4. | Guide |
| 2142 | (January speculative) The Fleet Logistics Division of the UESF is formed. | Guide |
| 2142 | (May) The Fleet Logistics Division orders the development of a large warp transport. | Guide |
| 2142 | (March speculative) Hulls capable of mounting w3 engines are developed. | Guide |
| 2145 | USS Horizon, first of the Daedalus class, is fielded. | Guide |
| 2146 | The PB-2 engines are given official clearance for w3 cruising. | Guide |
| 2146 | A convoy escorted by two Iceland class frigates is almost completely destroyed by a Romulan raiding party, though it is initially blamed on Nausicaans. | Guide |
| 2147 | Starbase One is declared operational. | Guide |
| 2147 | The construction of USS Enterprise begins. | Guide |
| 2147-2159 | About 400 ’Cochrane’ fighters are produced. | Guide |
| 2149 | The Nausicaan ’scare.’ | Guide |
| 2149 | The USS Hopkins is lost to hostile action. | Guide |
| 2150 | The Gradualist Party wins power in the United Earth Senate. | Guide |
| 2150 | Seven more Hopkins class ships are fielded. | I-74 |
| 2150 | (October) Test flights of USS Enterprise begin. | Guide |
| 2151 | (April 16) A Klingon courier crashes on Earth. | Guide |
| 2151 | The fate of the silent colony on Terra Nova is discovered by the survey cruiser USS Enterprise. | Guide |
| 2151 | USS Intrepid is the first Earth ship to report a Rihannsu (Romulan) raid, though the attacker of the SS Diana is unidentified at the time. The Intrepid’s evidence, however, is lost with the ship in the vicinity of Tau 1 Eridani. | Guide |
| 2151 | The Klingon 'incidents.' | Guide |
| 2151 | USS Enterprise encounters a Romulan patrol of Theta Eridani. | Guide |
| 2152 | (January 1) USS Carronade survives a Romulan attack on Defense Outpost 4. | Guide |
| 2152 | (speculative) The Upholder class USS Intrepid is named after the recently-lost Messier class ship of the same name. | Guide |
| 2152 | Phased particle beam weaponry and polarizable armor is introduced. | Guide |
| 2153 | The Xindi strike Earth. | Guide |
| 2153 | (speculative) Some Messiers are re-classified as Verdun attack cruisers. | Guide |
| 2153 | (speculative) Some Messiers receive a fourth warp engine upgrade. | Guide |
| 2153 | (May 25) USS Intrepid is involved in the first major Klingon confrontation, with three Birds of Prey. | Guide |
| 2155 | Starbase One is destroyed by a specific Romulan attack. | Guide |
| 2156 | Romulans begin to overtly attack some Earth colonies. | Guide |
| 2156 | USS Patton reports its own destruction by Romulan forces. The attack results in a declaration of war by Earth. | Guide |
| 2156 | Punitive actions begin against the Romulans. | Guide |
| 2156 | Full-scale war against the Romulans begins. | Guide |
| 2156 | Convoy tactics changed from ’constant escort’ to ’relay.’ | Guide |
| 2156-2157 | (June to June) Six Mercury class ships are lost. | Guide |
| 2156-2159 | Phase II of the Romulan War: Romulans conduct offensive towards Earth and its allies. | Guide |
| 2157 | Fleet actions between the UESF and the Romulans occur, most notably near Gamma Tri. | Guide |
| 2158 | Major concern regarding a potential Romulan invasion of Sol space is entertained. | Guide |
| 2158 | It is discussed that almost 100 colonies and outposts may have to be abandoned, in order to consolidate a defense of Earth’s core resources. | Guide |
| 2159 | Three Messiers surprise & overrun a Romulan forward staging post in Sierra Sector. | Guide |
| 2159 | A UESF battle group locates and severely damages a Romulan fleet supply point. | Guide |
| 2159-2160 | (in the months before Cheron) Starbases Two & Three become operational. | Guide |
| 2159-2161 | Phase III of the Romulan War: the final attrition battles occur. | Guide |
| 2160 | The Romulan command post at Cheron is crippled. | Guide |
| 2161 | The final Romulan ’plunge’ at Alpha Omega B. | Guide |
| 2161 | (May 24) USS Cavalier is destroyed by a Romulan attack, after the cease fire. | Guide |
| 2162 | The last Messier, USS Braxton, is destroyed in a warp system failure. | Guide |
| 2162 | (January 21) USS Cavalier survivors are rescured from an M-class world. | Guide |
| 2162-2164 | The Tarn Conflict | Guide |
| 2164 | After re-analyzation of SS Tupac Amaru’s sensor data, the 2146 raid previously blamed on the Nausicaans is properly attributed to the Romulans. | Guide |
| 2172 | Dr. Helmut Kreutzer, aboard the surveyor USS Schliemann for a pre-colonization assessment mission, dates the planetwide ruins on planet 522-IV as over 7.5 billion years old. | Guide |
| 2177 | The last Hercules model is decommissioned. | Guide |
| 2188 | The sublight and low-warp versions of the DY series cease production. | Guide |
| 2188 | The USS Columbia is destroyed by a Klingon raid. | Guide |
| 2190-2199 | All but 10 Roanokes are withdrawn from service. | Guide |
23rd Century
| YEAR | EVENT | REF |
| 2201 | The re-settled Terra Nova colony thrives. | Guide |
| 2209 | The Conestoga reactor on Terra Nova is shut down. | Guide |
| 2260-2269 | The last nine of 10 Roanokes, used as navigation training vessels, are withdrawn from service. | Guide |
| 2265 | The USS Enterprise uncovers the fate of the SS Valiant. | Guide |
| 2266 | Khan Noonian Singh’s DY-100 is discovered in the Mutara Sector, 50 lightyears from Earth. | Guide |
| 2279 | USS Frost Ridge, the last of the Roanokes, is retired. | Guide |
| 2285 | The Ascender reactor on Terra Nova is shut down. | Guide |
| 2291 | The Spirit reactor on Terra Nova is shut down. | Guide |
24th Century
| YEAR | EVENT | REF |
| 2347 | The Cardassian War starts. | Dom, ? |
| 2353 | The Tholian War begins. | ? |
| 2354 | The Taneko Fleet structure is introduced, as Starfleet reorganizes. (Year is speculative.) | ? |
| 2358 | The Tzenkethi War starts. | Dom |
| 2360 | The Tholian War ends. | ? |
| 2362 | The Tzenkethi War ends. | Dom |
| 2365 | The remains of Lt. Col. Richey, USAF, of Charybdis (TAU Three), are found on Theta 116-VIII by the USS Enterprise. | Guide |
| 2366 | The Cardassian War ends. | Dom, ? |
| 2366 | A joint UFP-Tarn survey of Torgu-Va finds descendents of the Tarn and humans (from the USS Verdun) still fighting. | Guide |
| 2372 | The Klingon Empire disolves the Khitomer Accords and declares war on the UFP. | Dom |
| 2373 | The Klingon War suddenly ends. (Early in the year) | Dom |
| 2374 | The Dominion War starts. | DS9, Dom, ? |
| 2375 | The Dominion War ends. | DS9, Dom, ? |
References
Guide – Guide to the UFP Starfleet (electronic)