Before 19th Century

Unknown, but probably before 50 million years B.C.

• The Alterans evolve and progress into the first evolution of humanity, to a scientific level far beyond that of present-day humanity along the path to ascension.

• A philosophical schism emerges between two factions of the Alterans. The larger faction, known as the Ori, progresses towards belief in religion, and the smaller faction towards belief in science. Ultimately, their viewpoints diverge so much that the two groups split apart and begin to oppose each other, culminating in the Ori attempting to destroy the disobedient Alterans.

• The remaining Alterans hide on Celestis. The scientist Amelius creates the Ark of Truth, a mind programming device that can be used in a war against the Ori. However, instead of going to war, the Alterans decide to leave their galaxy, and began searching for a new home. The Ark is left behind buried on Celestis.

Between 50 to 30 million B.C.

• The Alterans, after thousands of years of searching, discover the Milky Way Galaxy, where they eventually settle down and build an impressive empire, becoming known as the Ancients. The first landing place for the Alteran ship in the Milky Way Galaxy was on the planet Dakara. Other early settlements of the Alterans in the Milky Way Galaxy included Earth, which the Alterans called "Terra". They begin seeding the Milky Way with Stargates. They colonize many planets and seed a network of Stargates throughout the galaxy, the oldest of which, the Antarctic Stargate, was planted on Earth 50 million years ago.

Between 30 and 10 million B.C

• Lantean city-ships existed on Earth in the area now known as Antarctica and possibly on Praclarush Taonas. An outpost existed on Praclarush Taonas that was identical to the outpost found in Antarctica, which was associated with the city-ship Atlantis. Each outpost had a ring transporter platform and was powered by a device the Ancients called a "Potentia", which is called a "Zero Point Module" (ZPM) by modern-day humans.

• The Ancients had built a large settlement on P3X-439 and placed a Repository of Knowledge within a monument's walls. The Repositories are meant to contain all of the current knowledge of the Ancients who populated the database at the time. Other early Ancient settlements were Taoth Vaclarush, Valos Cor, and Verus Gen Bree.

Between 10 to 5 Million B.C.

• The humanoid race from the Ida Galaxy known as the Asgard began exploring the Milky Way galaxy in spaceships.

• The Ancients launched the automated ship to seed Stargates throughout many galaxies, with a second ship called "Destiny" planned to follow it up and explore those planets.

• The Ancients within the Milky Way suffer from a devastating plague, possibly of Ori origin. Many try to ascend in order to escape.

• Atlantis, the Ancient capital city within the Milky Way, departs for the Pegasus galaxy via its stardrive. Some speculate that they were fleeing from the plague. A Lantean named Ayiana is left behind, sometime around then she becomes infected with the plague, and ends up frozen in ice.

• Once the city leaves, the Ancients activated the Dakara Superweapon to try and reseed life in the galaxy after the plague.

• The ascended Ancients used their combined power to shield the existence of humanity in the Milky Way and Pegasus galaxies so that the Ori are unaware that they exist.

• The Ancients settle within the Pegasus galaxy (on the planet Lantea), colonize several worlds, and investigate the evolution of humanity on others. Their people come to be known as the Lanteans.

• The Ancients in the Pegasus Galaxy, seed the galaxy with humanity and unwittingly created their future rivals, the Wraith. The Wraith was the result of blending iratus bug and human DNA. This blending resulted in the Wraith's need to feed on humans for their own survival.

• The Ancients experiment in mini-drone technology, making advancements on the larger size drones already operational in the Milky Way Outposts.

• The Ori ascended and created a second generation of humanity in their home galaxy. The ascended Ori added to the Book of Origin about worshiping them as gods because they discovered that they could gain more power in the ascended planes through man's relinquishing of his free will.

• The Ori taught their humanity that the Ancients were "evil spirits" and wrote about the rift that separated them in the Book of Origin.

• The Ori followers build their capital city, the City of the Gods, near to the Altera’s mountaintop settlement that was called "Ortus Mallum". The City of the Gods was the training place for men to become the Priors of the Ori and the abiding place of the ascended Ori.

• Several generations of Ori Priors and unbelievers alike searched the ruins of the Alteran mountaintop settlement. Whenever the Priors found artifacts that pre-dated the Ori ascension, they deemed them as heretical and then brought them to the City of the Gods to be burnt in the fires. Heretics searched for evidence to discredit the Ori's word and intention and gathered up these artifacts in secret until they could obtain enough proof that would cause even the most fervent believers to doubt the Ori.

• Humans in the Ori's home galaxy were spread apart on different planets and traveled using the Stargate.

Around 1 Million B.C.

• Praclarush Taonas was made uninhabitable through volcanic activity on the planet, although the Ancient outpost remained intact when the shield held back the lava, eventually forming a dome once the molten rock cooled down.

• Crystalline entities occupied a planet designated as P3X-562.

• Sentient liquid lifeforms took over a planet with ruins now covered completely in water.

• Firefly-like energy lifeforms lived on a moon later designated as M4C-862

• Daniel Jackson surmises that the corridors of Hadante were created around this time.

Around 100,000 B.C

• On P3X-888, the later stages of evolutionary development appear for the Goa’uld, leading to sentience. Limited by their physical form, the larval Goa’uld adopted a parasitic relationship with other forms of indigenous life – including the Unas, the largest predator found on the planet. Using the Stargate on P3X-888 the Goa’uld traveled to other planets in their Unas hosts, conquering and multiplying.

• On Earth, the first Homo sapiens appeared. Their genetic makeup is devoid of many elements that mark them as related to the Ancients, aside from eventual physical similarities.

Around 98,000 B.C.

• The world later designated P5C-353 is dying. The microscopic organisms that live on the planet created an orb in which they slept for 100,000 years waiting for someone to take them through the Stargate. Once exposed to the atmosphere of a living planet, they will awaken.

Aound 73,000 B.C.

• A number of conflicts erupted among primordial Goa’uld for what are a limited number of suitable Unas hosts. Goa’uld unwilling to blend with common creatures vie for access to the Unas, eventually escalating into bloody conflict with claws and early makeshift weapons. The Goa’uld population drops drastically.

Around 66,000 B.C.

• The Unas population begins to thrive again. Unblended Unas are found in remote areas, wary of the parasites. Even in this state, the blended Unas are superior in every way, having developed a social structure, a functional language (ancient Goa’uld), and tool use. Larval numbers are artificially limited through cannibalism to control the population growth.

Around 42,200 B.C.

• The Goa’uld rapidly form a thriving - albeit small – society, helped by their genetic memory. The species’ genetic memory accelerates their development at an exponential rate. In short order they discovered the Stargate and begin the exploration of other worlds to hunt and seek new hosts. Their rapid development and cutting of evolutionary corners dooms Goa’uld into a parasitic existence forever accustomed to taking what they desire, with no thought or concern for other species.

Around 28,000 B.C.

• The Goa’uld discovery of the worlds formerly controlled by the Ancients provided the Goa’uld with a rapid influx of technology. P3X-888 is entirely abandoned, saved as a breeding ground for Unas hosts, who still lived in fear under the boot of their parasitical oppressors.

• The Goa’uld leadership is formed from out of the early Unas tribal culture, lead by the Alpha Male, Atok. This leadership would rise to the first recognized Goa’uld order, fueled by the impressive physical forms and near-magical technology appropriate from ruins of the Ancients.

• An Asgard ship with its crew are placed in suspended animation. However, the navigational computers were damaged at some point, and the ship drifted across galaxies, ultimately ending up in the Milky Way Galaxy.

• Petty squabbling among the Goa’uld eventually give way to new leadership headed by Apep, physically superior son of Atok, who brutally kills the warlord in public fashion in full view of the other Goa’uld. Instead of claiming the forces of Atok for his own, Apep divides them equally among the strongest and solicits their stewardship. To his underlords, Apep uses them to secure the peace, ensuring that no one among them becomes too powerful.

• Apep decrees his underlords as his brothers and sisters in rulership, although he remains firmly in control. The underlords – Ra, Nut, Thoth and their servants Osiris, Isis, and Bastet – pledge their loyalty and, for a time, a single united leadership rules the Goa’uld. Thus united, the symbiotes sweep through the galaxy like a plague. Their numbers swell and the Unas are nearly wiped out – again too many larval Goa’uld are bred. In addition, the life of the Goa’uld is significantly lengthened, creating even more of a population problem. Apep continues the ancient practice of ritual cannibalism.

• Goa'uld empire founded by the Goa'uld tribes.

• Anubis rises rapidly through the ranks with numerous victories and pledges his support to Apep, who decrees him as Lord of the Dead for his ruthlessness.

• With large portions of the Stargate network mapped, vast fleets at their disposal and no sign of the Ancients, the Goa’uld begin to carve up their spoils amongst themselves.

• The Goa’uld, Thoth is able to create the first rudimentary sarcophagus by reworking technology of the Ancients. The device is primitive and powerful, able to sustain an Unas host for several generations. The device, however, exerted a terrible toll on the Goa’uld larval, as the sarcophagus introduced the mineral naquadah to the larva’s bloodstream and the Goa’uld queen are unable to prevent its transference to future Goa’uld larva.

• Apep begins to falter as leader of the Goa’uld and demonstrates signs of madness. Anubis is found at Apep’s side, becoming the ruler’s most trusted and rewarded adviser. His original sons and daughter, including Ra, looked on as Anubis is favored unlike no other.

• Anubis solicited from Apep the secret location of a great cache of Ancients weapons. Secretly, Anubis learned the location by forcibly exposing Apep to Thoth’s sarcophagus, driving the Goa’uld further from sanity.

• Determined to rule the Goa’uld, Anubis made his bid for power, utilizing a super weapon, which harnessed enormous amounts of power. Before the other Goa’uld, he forcibly removed Apep’s symbiote and devoured it, declaring himself Emperor. Betrayed, the other Goa’uld banded their forces together to defeat Anubis. The battles raged for a hundred years, entire star systems were destroyed and legions of Unas fell in the crossfire. The Goa’uld themselves were nearly decimated, but eventually defeated Anubis and destroyed his forces. Captured, the Lord of the Dead was banished by the remaining symbiotes.

• Ra instituted himself as ruler of the Goa’uld, again taking on the leadership structure originally formed by Apep. For his part, Thoth is also banished, although his understudy, Telchak remained. Bastet is rewarded for her help against Anubis. Osiris and Isis joined the ranks of the Goa’uld underlords as well, and Anubis’ super weapon is dismantled. Ra took the six crystals that powered the device and divided them amongst the remaining loyal Goa’uld, knowing that his species’ pretty bickering would ensure that the weapon is never used again.

• Ra appointed a new hierarchy of rulers to aid in the governing of the Goa’uld. By once again dividing the spoils of several millennia of conquest, Ra created a cadre of System Lords. Membership to the body was by vote of the existing members and afforded many benefits, including access to Unas hosts in order to maintain armies. In this act, Ra created the power structure that served the Goa’uld through to present day, and anoints Egeria as his Queen. Ra takes other queens, such as Hathor, during his long rule.

• Osiris, Isis, Tiamat and Yu join the ranks of the System Lords. Minor underlords include Ba'al, Heru'ur and Setesh.

• Naquadah, the foundation of both Ancients and Goa’uld technology is discovered in small quantities. Ra petitions the System Lords for a new era of expansion and offers exclusive rights and access to Unas in exchange for naquadah shipments. Their attention diverted, the System Lords begin a race of exploration.

• Humans were settled on the planet known as Altair, but they had to develop a way to preserve themselves when the surface of their planet became toxic. They created android bodies in which to harbor copies of their consciousnesses.

• A war between the Ancients and the Wraith was started, when the Wraith began consuming human populations, by sucking on their life forces.

• Ancient scientists developed nanites to kill the Wraith from within, but the nanites exceeded their programming and take on human form. These human-form Replicators settled on Asuras and came to be known as Asurans. Realizing their mistake, the Ancients send warships to Asuras and bombarded the Asuran settlement to destroy them, as they were deemed a failed experiment. Unbeknownst to the Ancients, however, some nanites survived and began to build their society once more.

• The Lagrange Point Satellite was built and placed as a last line of defense for Atlantis, and fired a powerful energy beam.

• The Ancients created a device that was aimed at killing Wraith from within by creating explosive tumors, but the plans turned out to be harmful to everyone in proximity, including Ancients and humans.

• The Ancients develop Project Arcturus on Doranda that was meant to be a powerful energy weapon, but the technology was untested and ended up killing several of the Ancients and Dorandans before the Wraith returned to the world and destroyed it.

• An underwater drilling platform was designed to draw geothermal energy into Atlantis, but was abandoned, apparently when the siege on the city began.

• The Ancients build a hangar facility on the planet Taranis, where they keep one of their damaged warships. The facility's shields were powered by geothermal energy drawn from the magma chamber in the caldera of a dormant supervolcano. Because of the dangers of causing the volcano to reawaken, the Ancients programmed in several failsafes to prevent the shields from being run continuously at maximum capacity for an extended period of time.

• The Ancients create a place called "Sanctuary" where they and others could hide from Wraith attacks inside a time dilation field. The shielded bubble was powered by a Potentia (Zero Point Module), and time within it was approximately 250 times faster relative to time outside of it. The doorway into Sanctuary was only one-way, meaning that once a person stepped inside, he couldn't turn around and go back out. The main purpose of the Sanctuary was not just for the humans who found it to hide from the Wraith, but for the last of the Ancients to seek the path to ascension.

• One by one, Ancient worlds fall to the Wraith. The Ancients abandon their great cities, including the one on the planet Athos, which the Athosian humans called the City of the Ancestors. The Athosians never ventured into the city for fear that their entry would summon the Wraith.

• The Ancients sent out three of their powerful warships deep into Wraith territory, and they were captured by the Wraith. The Wraith used the ships' ZPMs to power a cloning facility that produced thousands upon thousands of their drone soldiers. After that, the war was won for the Wraith because they severely outnumbered the Ancients and could execute relentless attacks.

• An Ancient warship loses communication and shields when the Wraith attacks the vessel. Although the Ancients engines are damaged, they manage to escape into space. They realize however, that their main drive was leaking deadly radiation and they are forced to abandon ship, leaving the vessel to drift in a two-hundred-year elliptical orbit around a nearby dwarf star.

• The Ancients began hiding Potentias (ZPMs) throughout the galaxy, including the planet Dagan, where the Sudarian worship the Ancients. A brotherhood of fifteen monks was formed, called the "The Quindosim", whose sole purpose was to protect the sacred artifact, hoping that the Lanteans would return and reward the Sudarian people for completing their task.

• The Ancient battleship Aurora was crippled far from Atlantis, so the crew placed themselves into stasis chambers for the long trip back to Lantea.

• The war between the Wraith and the Lanteans in the Pegasus galaxy escalates to the point where Atlantis is constantly under siege. The Lantean people decide to leave Atlantis for Earth by going through the Stargate. Atlantis, protected by a powerful force-shield, is sunk to the bottom of the ocean. The Lanteans leave Atlantis to find that the native peoples on Earth are quite primitive, preventing them from ever rebuilding their great civilization; the Lanteans then live out the rest of their lives with the native peoples.

• The Ancients on Earth go on to influence the language and mythology of Ancient Rome and the myths of Greece; their research on ascension forms the basis of Buddhism. Many Ancients continue to use the Stargate network, and form an Alliance of Four Great Races, with the Nox, the Asgard, and the Furlings. This unified Alliance lasts for centuries.

• An incarnation of Elizabeth Weir from an alternate future is rescued from the ocean of Lantea after accidentally traveling backwards in time from the year 2004, using an altered Puddle Jumper capable of time travel. She befriends the Ancient Janus, who programs Atlantis to rise from the ocean if the shields fail, blocks all but the Earth gate from making connections to Atlantis, and makes alterations so that instead of using the multiple remaining ZPMs in parallel, Atlantis uses the remaining ZPMs sequentially. He then puts Weir in a cryogenic sleep, to be automatically awoken when an active ZPM becomes drained so that she can exchange them, and to be found by this timeline's version of herself 10,000 years later.

• When the Altairans lived on the surface of Altair, they were compelled to leave the surface and live underground. An Altairan named Hubbald created the underground station and the transfer device, to transfer all the Altarians from Humans to Androids.

• The Asgard, a species and one-time ally of the Ancients, declare themselves enemies of the Goa’uld System Lords. The Goa’uld relish the opportunity to once again flex their muscles, but it soon becomes apparent that the Asgard are more than a match, leaving the System Lords to retreat and lick their wounds.

• Their resources running low, the System Lords launch a darling attack against the Asgard and Furlings – two longstanding allies. The Goa’uld strike with surprise and land a crushing blow, but in the years that follow, their enemies fight back with vengeance. The Asgard deal the parasites several major setbacks, but do not press the attack, not fully realizing the danger that the Goa’uld pose to their galaxy and others.

• Ra, badly injured, flees Asgard pursuers into an alien system. There he finds a lush world inhabited by a large population of primitives that bow to his divinity. The world – Earth – contains a vast number of natives that are suitable for blending. Transferring his symbiote into an Egyptian boy, Ra is infused with new vigor and life. Ra quickly determines that humans provide a near ideal host for the Goa’uld. Using a Stargate brought with him, Ra claims the world of the Tau’ri as his own.

• Ra institutes a ritual of stewardship, allowing each System Lord to visit the Tau’ri world and claim followers, who are then taken to a world of the Goa’uld choice and used as breeding stock. In order to maximize the number of potential slaves, the power of the Goa’uld overlords are expanded, placing them in charge of the entire breeding worlds, such as Chulak.

• Ra divides the Earth by strict geographical lines, ensuring that no Lord encroaches upon another territory. A significant number of Goa’uld rise to power during this time and are chronicled in the mythology and history of the Tau’ri.

• The Goa’uld use the Tau'ri as a template to create the ultimate host called the Jaffa, who serve as incubators for the Goa’uld larva. In order to ensure their loyalty, the parasite serves as the Jaffa’s immune system and will die without the symbiote.

• Telchak perfects the original sarcophagus design created by Thoth for use on humans. The results are more effective than anyone would believe, providing near immortality to the System Lords. The negative side effects are lessened even further, making repeat use benign to a symbiote. Even the dead can be brought back to life. Telchak hides the original Ancients device on Earth but keeps his notes in the Book of Thoth.

• Setesh (Seth), Osiris and Isis unsuccessfully attempt to assassinate Ra. Ra strips them of their status as System Lords and condemns them to an eternity of suffering. Both are forcibly removed from their hosts and placed in canopic jars. Setesh however, goes into hiding.

• The last remaining Lanteans either die out or ascend.

• Omoroca arrives on Earth and attempts to prevent the Goa'uld from securing domination over Humanity. The Goa'uld Belus kills Omoroca, though it has been theorized that her influence led to the eventual Human rebellion.

• The Tau'ri learn the truth of their would be rulers. In a moment when the System Lords are at their most complacent, they overthrow their Jaffa warriors, killing several Goa’uld, and bury the Stargate. While the loss of the Tau’ri is a great affront to Ra, the continuing battle with the Asgard demands his attention again. With numerous breeding worlds throughout known space available to them, the Goa’uld are unconcerned with the Tau’ri and resolve to deal with the problem when it is convenient to do so. As time goes on however, the Tau’ri are slowly forgotten.

• Alternate timeline - SG-1 from an alternate timeline travel back in time to steal a ZPM from Ra. They succeed, but are trapped in that time period. They attempt to start a rebellion against Ra, which fails and results in all of them killed, except for Daniel Jackson.

• Alternate timeline - Ra leaves Earth, taking his Stargate with him. This results in the Stargate program never taking place.

• With the help of Daniel Jackson from the first alternate timeline and the rest of SG-1 from the second alternate timeline, the Tau'ri in Egypt rebel against Ra, and Earth is freed from Goa'uld oppression.

• The Sodan, a faction of Jaffa, rebel against the Goa'uld System Lord Ishkur and free themselves. They start on a journey to find Kheb before settling on a hidden Ancient planet.

• Langara goes through a massive naquadria induced cataclysm that kills the Goa'uld Thanos.

• The Queen Egeria spawns the Tok'ra, a group of symbiotes opposed to the ways of the System Lords. Ra captures her, and senteces her to "eternal damnation" in a stasis jar.

• Hathor, the Queen of Ra, is placed in a sarcophagus in Mexico.

• The manfunctioning Sakari seed carrier crash lands on M35-117.

• The System Lords renew their assault against the Asgard and the Tok'ra. The battles are savage and, for the first time, the System Lords make progress against the more advanced Asgard.

• Merlin, realising the threat of the Ori, gives up his ascension and returns to human form, developing a weapon that could be used against ascended beings. He returned to this form with his knowledge and powers, making him one of the most powerful beings of his time on Earth.

• Merlin, re-established "Avalon" on Earth.

• Merlin develops a phase-shifting device, later called "Arthur's Mantle", to hide himself in an alternate dimension to develop his weapon in secret, supposedly where ascended beings cannot find him. When he left Earth, he left this device behind in "Avalon".

• Merlin started settlements on other planets, all centered around King Arthur and his Knights of the Round Table, including the community on a planet called "Camelot", where he had his sanctuary and left his library of research, historical documents, and prophecies. He protected his library and his anti-ascended weapon with a sophisticated security system.

• The Others send Morgan Le Fay to watch Merlin, because they feared that he might be successful in developing a device that could destroy ascended beings. Morgan Le Fay, finds Merlin on "Camelot" and destroys the weapon, but preserves Merlin in an Ancient stasis chamber because she agreed with what he was trying to do as far as the Ori were concerned.

• Morgan Le Fay established a private network of Stargates to hide Merlin and his knowledge of how to build the weapon. She put in place clues so that Arthur and his Knights could figure out where Merlin was hidden, but none of them succeeded in their quest.

• Goa'uld System Lord Ollathair is killed by a rival.

• The Stargate address for Newgrange is lost.

• The people of Newgrange start a life of freedom.

• Anubis and Telchak battled over the Ancient device known as the Telchak Device, from which Telchak had designed the sarcophagus. Anubis won the battle, but he did not find the Device. Telchak had hidden it in one of his temples in Central America, in modern-day Honduras.

• Anubis is banished from the Goa'uld Empire for what the System Lords deem to be "unspeakable crimes". He is able to Ascend, but is cast out by the Others.

• Anubis retreats to Kheb and tricked Oma into ascending him. As soon as Oma realized what she had done by ascending an evil being such as a Goa'uld, she tried to undo her work, but The Others stepped in. They sent him back "halfway" between corporeal existence and ascension, but he still remained a being of energy with eternal life. They also forbade him to use any knowledge or power obtained through ascension, unless he otherwise would have gained it as a Goa'uld.

• The Asgard became physically incapable of achieving cell division through meiosis (sexual reproduction). Reproduction after this point was achieved exclusively through a process of enhanced cellular mitosis (cloning).

• An Unas, is taken to the labyrinth on Cimmeria.

• Ghanaz enter an ice age and its star began a helium burning.

• Madrona is terraformed by an unknown race of aliens.

• Pyrus overthrows the Goa'uld ruling the planet designated P3R-636.

• Council of Elders are established.

• Ohper is born on P3X-774. He belongs to the species known as the Nox

• Even though The Others had long established their rules of non-interference, as far as interacting with the lower planes of existence, Orlin communicated the knowledge of how to build a powerful weapon for defense against the Goa’uld. Velonans were not advanced enough on their own to take the responsibility of suddenly having such power, so after they used the weapon on the Goa'uld, they turned it on other planets for conquest. The Others destroyed the Velonans because they would have been destroyed by the Goa'uld if Orlin had not interfered and banished Orlin to the desolate planet.

• The Goa'uld stop interfering with the planet Nasya.

• Shak'ran is killed by Apophis.

• The Sentinel is constructed on Latona; a weapon designed to protect the Latonans by making all Goa'uld who land on the planet vanish. It requires a caretaker to join with the machine to work. A flame in the city indicates that the caretaker lives. If the caretaker dies, the flame dies.

• Members of the Ancients in the Milky Way and in their home galaxy ascend to higher planes of existence.