15 billion years BCE The formation of the universe known as the Big Bang. Quinn tries to hide the USS Voyager from Q in this time period. ("Death Wish")

8 billion years BCE The Guardian of Forever is created ("since before your Sun burned hot in space" - Star Trek Chronology assumption based on "The City on the Edge of Forever")

4 billion years BCE A humanoid race seeds DNA across the Alpha Quadrant on various planets including Qu'onos, Earth, Vulcan and Cardassia. ("The Chase")

3.5 billion years BCE Q takes Picard to visit Earth during this time, when the chemical building blocks of life are first forming in the primordial ooze. ("All Good Things")

2 billion years BCE The Tagus civilization flourishes. The Tagus were a subject of particular interest to Captain Picard. ("QPid")

1 billion years BCE The galaxy-wide Slaver Empire is destroyed when one race revolts against the Slavers. Most intelligent life of this time is destroyed, and the only remnants of the Slaver Empire are stasis boxes and their contents. (One billion years before "The Slaver Weapon" - TAS)

300 million BCE A vessel crewed by insectoid beings is invaded by a magnetic organism. Trapped in orbit of Questar M17, the crew disable their own ship to prevent the spread of the entity. (300 million years before "Beyond the Farthest Star" - TAS)

100 million BCE A civilization in the D'Arsay system builds an automated craft designed to preserve their culture. ("Masks")

Millions of years ago The Organians transform into beings composed of pure energy. ("Errand of Mercy," Star Trek Chronology, p. 2)

1 million BCE When the ruins surrounding the Guardian of Forever were built. ("City on the Edge of Forever" TOS)

600 000 BCE The great T'Kon Empire goes extinct when their sun goes nova. ("The Last Outpost")

During this time period, Sargon's people explore the galaxy and establish colonies. ("Return to Tomorrow")

500 000 BCE Civilization flourishes on Bajor. ("When humans were not yet standing erect" - "Ensign Ro")

Around this time, the star Exo begins to fade, and the Old Ones begin to move underground on Exo III. ("What Are Little Girls Made Of?")

A great cataclysm happens on Sargon's planet, tearing the atmosphere away from the world. The survivors' are placed in round canisters to preserve them, and are put beneath the surface of the planet. ("Return to Tomorrow")

30,000 BCE The era when Neanderthal Man and Homo Sapiens Sapiens co-existed in Eurasia on Earth. ("Dear Doctor" - ENT)

c. 7625 BCE The Dominion is founded, in the Gamma Quadrant. (10,000 years before "Dogs of War" - DS9)

c. 5000 BCE The ancient Polynesians first leave the South East Asian area and slowly begin settling islands to the East. Samoa and Tonga were the main settlements. (historical accounts. The ancient Polynesians are depicted in the opening sequence of Enterprise)

4641 BCE The Shore Leave planet is established by an unknown alien race. (7009 years before "Once Upon a Planet." - TAS )

4000 BCE In ancient Babylon, the Sumerians began recording the cycles of the sun, the Moon, and the harvest. As their culture got more sophisticated, they built observation towers called ziggurats. From 300 feet up, they observed the movements of the Sun, Venus, and Mars. As new planets were discovered, they were given specific characteristics and a mythical god to rule over them. The heavens were divided into twelve sections, each governing a specific influence of daily life. This was the foundation of both modern astronomy and of astrology. (historical accounts, the zodiac appears in the opening sequence of "Enterprise")

3834 BCE A man named Akharin, an immortal, is born in a region of Earth later known as Mesopotamia. Akharin will lead hundreds of lives and be known as such men as Methuselah, Merlin, Abramson, Leonardo DaVinci, Johannes Brahms, Mr. Brack, and finally Flint. He will survive into the 23rd century. ("Requiem for Methuselah." TOS - Flint stated when he was born.)

2850 BCE When propaganda about the Vulcan primal nature first originated, according to Tolaris. (5,000 years before "Fusion" - ENT)

2650 BCE The Great Pyramid of Khufu (Cheops), is ordered built by the Egyptian pharaoh Khufu of the Fourth Dynasty to serve as a tomb when he dies. (In "Cold Front" (ENT) "Daniels" mentions this time period was visited by researchers from 2769.)

c. 1700 BCE Birth of Abraham of Ur, founder of the religion that would come to be known as Judaism.

c. 1200 BCE Birth of the prophet Moses in the Nile Valley of Earth.

850 BCE The monastery of P'Jem is constructed by Vulcans on a planet near Andorian space. At some point, it becomes a sanctuary for the practice of the Kolinahr discipline. "The Andorian Incident" (ENT). 3,000 years before the episode.

200s BCE In the third century, Archimedes (d. 212 BCE) first speculates about the possibility of the Sun being the center of the cosmos and the Earth being one of the planets going around it. The change from thinking of the Earth as the center of the solar system to a heliocentric model is a key development in the understanding of the nature of the universe. (historical accounts)

64 BCE Roman Republic becomes the Roman Empire, Earth's first large scale trans-national government. (historical accounts)

c. 6 BCE The reputed birth of Jesus of Nareth, an important Terran religious figure. (historical accounts)

320 CE The Vulcans achieve warp capability. (Star Trek Star Charts, p. 52)

325 CE The 1st Council of Nicea is convened at the request of the Roman Emperor Constantine, the religious text known as the "Gospels" are compiled. (historical accounts)

350 CE The Founders (Shapeshifters) create the Dominion in the Gamma Quadrant. (about 2000 years before DS9)

350 CE 2nd Council of Nicea, Christianity becomes the official religion of the Roman Empire (historical accounts)

370 CE On Vulcan, the time of the Great Awakening as the teachings of Surak, emphasizing logic and control of emotions, lead to a period of reformation.

"Gambit, Part II" (TNG). 2, 000 years before the episode.

In was at this time that a group of Vulcans left the planet to strike out on their own and form a new society. These are the ancient founders of the Romulan society, who no doubt left Vulcan in rebellion to Surak's teachings of logic and pacificism. ("Balance of Terror", Star Trek Encyclopedia)

c. 375 CE The Jem Hadar become the first line of defense for the Dominion. (2,000 years before "What You Leave Behind")

c. 420 CE The Romulan Star Empire is founded as the rebel Vulcans colonize the twin planets of Romus and Remus. (50 years after conflict with Surak - which is the length of time indicated in some fandom and novels.)

476 CE Collapse of the Roman Empire (historical accounts)

500s CE The Mayan culture arises on Earth. Kukulkan, a benevolent alien being, assists the Mayans in their development. The Mayans will survive as a culture into the 10th century. ("How Sharper Than a Serpent's Tooth." - TAS)

c. 570 Birth of the Mohammed, an important Terran religious figure (historical accounts)

621 Mohammed's brother-in-law writes the Quran, reputed to be a transcription of the teachings of Mohammed. Beginning of the religion known as Islam. (historical accounts)

870 Kahless defeats the tyrant Molor and unifies the Klingon nation on Qu'oNos. "Rightful Heir" (TNG). Fifteen centuries before the episode.

930 The Klingons achieve warp capability. (Star Trek Star Charts, p. 55)

1154 The Andorians achieve warp capability. (Star Trek Star Charts, p. 52)

1100s The Aztec culture begins on Earth. The Aztecs are nurtured by the long-lived alien being known as Kukulkan, and will fluorish into the 16th century. ("How Sharper Than a Serpent's Tooth." - TAS)

c. 1150 Tarquin is born. (1000 years before "Exile") Also, the spheres are first constructed in what would come to be known as the Expanse. (1000 years before "Chosen Realm")

1200s Within the Delta Triangle region of space, in a different space-time continuum, the Elysian council is formed. (1000 years before "Time Trap" -TAS)

1372 The Hur'q invade Qu'onos, the Klingon Homeworld, and pillage the planet. "The Sword of Kahless" (DS9). One thousand years before the episode (2372).

1372. The Rumarie celebration, an anachronism from Vulcan's emotional past, is held for the last time. "Meld" (VGR). 1,000 years before the episode (2372)

1452 When Leonardo da Vinci was thought by historians to have been born. He is later revealed to be the man known as Flint. (sources: historical sources, Star Trek Encyclopedia, "Requiem for Methuselah" (TOS).) One of da Vinci's famous sketches is of a proposed flying machine (shown in opening credits of Enterprise).

February 19, 1473 Nicholas Copernicus (d. May 24, 1543), the famous astronomer, passes born. This same year his book, De Revolutionibus Orbium Coelestium ("On the Revolutions of the Celestial Orbs"), is published. In this book, Copernicus outlines the mathematical theory behind the orbits of the planets. (historical accounts, A heliocentric map of the solar system, reminiscent of Copernicus' drawings, appears in the opening sequence of Enterprise)

July 29, 1588 England defeats the Spanish Armada at the Battle of Gravelines, an historic event that is a favorite of Malcolm Reed. The British victory preserved Britain as a global power. (historical accounts. Future Tense)

 February 15, 1564 Galileo Galilei is born in Pisa, Italy. (historical accounts)

August 1609 Galileo Galilei builds the first astronomical telescope. His observations about the moon, planets in the solar system, the sun, and individual stars in the Milky Way confirms Copernican theories. The sky is no longer the sole domain of mystics. (historical accounts, Enterprise exploration timeline)

January 4, 1643 Sir Isaac Newton is born in Woolsthorpe, Lincolnshire in England (historical accounts)

1666 Sir Isaac Newton postulates laws of universal gravitation linking celestial and earthly mechanics and his three laws of motion, and develops calculus to discover and describe his theories. (historical accounts, Enterprise exploration timeline )

1675 The last time the dark book known as the Kosst Amojan was removed from the Bajoran archives prior to 2375. (700 years before "The Changing Face of Evil")

April 28, 1709 The second HMS Enterprize, of the British Royal Navy is completed at Plymouth, England and launched on this date. The prior Enterprise, captured from the French, was spelt with an "s". (Historical accounts. A rendering of one of the four vessels named HMS Enterprize appears in the opening credits of Enterprise)

1692 The people of Megas-Tu are forced to leave Earth in Salem, Massachusetts, New England. ("The Magicks of Megas-tu." - TAS)

1750 Approximate time that Tarquin's last companion passed away. (Over 400 years before "Exile" - ENT)

August 1774 The fifth HMS Enterprize is launched at Deptford, England. It would serve as a convoy vessel for the English Navy throughout the Revolutionary War. She was eventually retired and broken up in 1807. (Historical accounts. A rendering of one of the four vessels named HMS Enterprize appears in the opening credits of Enterprise).

May 18, 1775 Benedict Arnold captures the sloop of war, HMS George on Lake Champlain. She renamed USS Enterprise when she enters American service (She was lost at the Battle of Lake Champlain on July 7, 1777) This is the first warship to bear then name USS Enterprise. (historical accounts)

July 4, 1776 The United States declares her independence from Great Britain. (historical accounts)

December 20, 1776 The United States Congress purchases a Dutch Schooner and christens her USS Enterprise. She served in the Continental Navy in Chesapeake Bay until 1777.(historical accounts)

September 3, 1783 Treaty of Paris is signed. Great Britain surrenders to the American revolutionaries and recognizes the independence of the United States of America. (historical accounts)

November 21,1783 The first recorded manned flight in a hot air balloon took place in Paris. Built from paper and silk by the Montgolfier brothers, this balloon was piloted on a 22 minute flight by two noblemen from the court of Louis XVI and Marie Antoinette. From the center of Paris they ascended 500 feet above the roof tops before eventually landing miles away in the vineyards. Local farmers were very suspicious of this fiery dragon descending from the sky. The pilots offered champagne to placate them and to celebrate the first human flight, a tradition carried on to this day. (historical accounts, hot air balloons are represented in the history of flight sequence in the opening credits of Enterprise)

1799 Henry Spencer of Baltimore, Maryland, builds a sailing ship, a schooner named Enterprise. Known as "Lucky little Enterprise". She fought in the undeclared war with France, capturing the Tripoli in 1801. I have to believe that this is the ship they meant to portray in the seventh Star Trek movie, "Star Trek: Generations" For the record, in that movie, the ship was portrayed by the Lady Washington. She ran aground and broke up on Little Curacao island in the West Indies on July 9, 1823. (historical accounts. Enterprise exploration timeline)

1831 Congress purchases a schooner, designated Enterprise, she sees no combat service and is decommissioned and sold for scrap in 1841 (historical accounts)

February 23-March 6, 1836 At the site of an old mission building in San Antonio called the Alamo, rebelling against the repressions of Mexico's self-proclaimed dictator, Santa Anna, a band of 189 Texas volunteers defied a Mexican army of thousands for 13 days of siege (from February 23 to March. 6). The Alamo defenders died to the last man, among them such storied names as William Travis, Davy Crockett, and Jim Bowie. (historical accounts, basis of the holodeck program much used by O'Brien and Bashir - particularly in the 7th season of Deep Space Nine)

1851 The Suliban homeworld, in sector 3641, becomes uninhabitable. The Suliban become a nomadic people, existing in pockets throughout the Alpha Quadrant. ("Broken Bow" less 300)

1877 Giovanni Schiaparelli sees lines on Mars, which he calls canali, Italian for channels or furrows. Canali is translated as canals, suggesting they are not natural phenomena. Humans actively speculate about intelligent life on other worlds. (Enterprise exploration timeline)

1853 The war between the Denoblians and the Antarans ends. During the conflict, the Denoblians had inflicted 20,000,000 casualties on the Antarans. Dr. Phlox's grandmother lived through the final battles of this conflict. (300 years prior to "The Breach")

April 10, 1861 The American Civil War begins. The war between the northern and southern American states threatens to tear the United States apart. (historical accounts)

June 17, 1861: Thaddeus Lowe demonstrates a balloon named Enterprise at Columbia Armory, Washington DC. The balloon ascends to 500 feet, and transmits a telegraph to Abraham Lincoln. (historical accounts)

1863 The Scagarans abduct a group of humans from the American west and enslave them. (40 years prior to the Wright Brothers Flight - "North Star")

1864 The Scagarans take their human slaves to a colony planet located in what will come to be known as the Delphic Expanse. Within six months, the humans have rebelled, overthrown the Scagarans, and have destroyed the Scaragan space ship. Their leader, Cooper Smith, becomes a folk hero to the humans and a villainous figure to the surviving Scaragans. (date is speculation based on "North Star")

1865 Reconstructing their society based on what they remember from having lived in the Western United States, the now freed humans build buildings, create a civic society and create a set of laws to govern themselves. Key among these laws are specific prohibitions to prevent the surviving Scagarans from ever re-creating their technology or gaining any power whatsoever in society. For example, a law is passed banning the Scagarans from receiving any sort of education. (date is speculation based on "North Star".)

April 9, 1865 General Robert E. Lee surrenders the Confederate Army of Northern Virginia to Ulysses S. Grant's Union Army of the Potomac. The American civil war ends in a Federal victory, the Union is preserved but at a terrible cost. Over 600,000 Americans lost their lives in the war and the wounds it inflicted will take over a century to heal. (historical accounts)

April 14, 1865 US President Abraham Lincoln is assassinated by actor John Wilkes-Booth while the president is attending a comedy entitled "Our American Cousin" at Ford's Theater in Washington, DC. Lincoln was a hero of Captain James T. Kirk. (historical accounts)

June 13, 1874 The fifth Enterprise, a bark-rigged screw sloop-of-war, has a career that is similar to the starships that would one day bear her name. She surveyed the Mississippi, Amazon and Madeira rivers between 1878-1880. Between 1883-1886, she conducted hydrographic surveys that saw her circumnavigate the globe. From 1888-1890, she was assigned patrol duties in the Atlantic, Caribbean and Mediterranean to show the American flag and protect American diplomatic interests. From 1891-1909 she served as a training ship for Naval and Maritime Cadets. She was scrapped on October 1, 1909. (Historical Accounts)

1893 Lt. Commander Data arrives from the future to investigate the invasion of 19th century San Francisco by life-forms from Devidia II in the 24th Century. ("Time's Arrow, Parts I and II")