Original Universe timeline

Year 0

 * User Sarge arrives a few minutes before the beginning of the BZPB multiverse, and witnesses something horrifying.
 * The Architect and the other Users create the multiverse from many pre-existing universes for a then-unknown purpose. (It later turned out that it was meant to be a giant virtual game).

Year 75

 * Shattered Mirror Blackout creates the Ta'har race in his image.

Year 200

 * The "Riders" unify their planet and begin setting out to conquer the stars.

Year 344

 * The First "Rider" Empire reaches its zenith.
 * The Council of the Great Beings first decision to intervene in an affair outside of its purview is made: namely, to slowly decrease the strength of the Rider Empire.

Year 500

 * The First Vrai-Rider War begins.

Year 520

 * The First "Rider" Empire is severely weakened by the war, and withdraws its forces to its home galaxy. It spends the next 20,000 years restructuring itself and attempting to conquer its galactic cluster.

Year 610

 * Years of tensions between the Vrai and the Great Beings come to a head when the Vrai attack several Great Being outposts. The Vrai War is declared.

Year 625

 * Attempting to break the stalemate the war had become, the Vrai invade the Matoran Universe, resulting in the Great Beings creating the Elite Makuta: Blackout, Starscream, Barricade, Brawl and Bonecrusher to fight off the invaders.
 * Caiaphus is exiled from the Matoran Universe for his illegal activities, and failure to defeat the Vrai. He flees to the Shattered Mirror Universe.
 * The Reformed Second Brotherhood of Makuta is created, and manages to escape the confines of the MU to establish a base on another planet. It becomes a rogue sect, completely isolated from the main Brotherhood of Makuta.

Year 627

 * The Elite Makuta drive the Vrai out of the Matoran Universe, but not before they can release a virus on Stelt, which begins to slowly turn the inhabitants into Vrai.
 * With the MU campaign lost, the Vrai agree to a ceasefire, and the Great Beings and the Vrai sign a peace treaty officially ending the war. In the treaty, the two species agree to abandon any territories they had annexed, and create a demilitarised zone 100 light-years wide along their borders to be administered by a neutral party.
 * Starscream, Barricade, Brawl and Bonecrusher are placed in stasis pods. Blackout escapes this fate by joining the Brotherhood of Makuta.
 * The Knights of the Blue Sky predict Blackout's future treachery, and make an unsuccessful attempt on his life.

Year 20,520

 * The "Riders" finish the conquest of their cluster, and are once more powerful enough to take on the universe. They begin to slowly conquer Vrai and non-Vrai territories in space. The Second "Rider" Empire is born.

Year 20,576

 * Kakamu is naturally created by the Great Beings as one of the Matoran of Metru Nui. He is a Ta-Matoran welder.

Year 20,580

 * The Matoran Civil War occurs, which Kakamu is drafted into on the side of the Ta-Matoran. One day while fighting in Ga-Metru, the protodermis banks are flooded and he is swept out to sea, somehow transforming into a Toa before washing up on Daxia. Disorientated and with no wish to return to the war, he joins the Order of Mata Nui.
 * The Second "Rider"-Vrai War is officially declared. No clear victor will be in sight for the next 13,000 years as much of the universe burns.

Year 30,075

 * Malygos commits an unknown crime against the nobles of the world, and is placed in the Pit by Zev Raregroove.

Year 33,075

 * Blackout finds a secret database created by the Order of Mata Nui. He spends his spare time researching it, and eventually discovers the existence of the Users. He is enraged by this discovery, and plans revenge.
 * Blackout begins recruiting an army of minions to help fulfil his plan.
 * The Architect enlists the Great Being Okk to create the Shattered Mirror in response to Blackout's gained knowledge.

Year 33,105

 * Blackout gathers a group of Rahkshi and leads an attack on the Pit, the location of which he previously learnt from the Order database he discovered 30 years earlier, kills the jailer, and escapes with several prisoners, including Malygos.

Year 33,110

 * An Order of Mata Nui operative discovers who broke Malygos out of the Pit, and attempts to inform his superiors. Before he can do this, however, he is killed by Blackout.

Year 33,580

 * The Arcturus core technology is invented by Makuta Treyiah. Two prototypes are placed on Treyiah's ship in order to power it. They eventually aid in his demise, and are much later used to power the Thunder Arrow, Nemesis, Airship One, and eventually Darkmount.
 * The Vrai, with aid from the Great Beings and other forces, are able to gain the upper hand against the Second "Rider" Empire.

Year 34,080

 * Blackout finds out that Treyiah has been attempting to discover information about his plan, and kills him by tossing him into one of the Arcturus cores on board his ship.
 * The Second "Rider" Empire is extinguished, and many planets are liberated. They either align themselves with the Great Beings, become subjects of the Vrai, or form their own governments.

Year 40,080

 * Kakamu joins the Brotherhood of Makuta.
 * The events of BZPower Battles: Peace for our time take place.

Year 41,080

 * The Shadow Proclamation is formed, and declares war on the Vrai.

Year 50,080

 * The Makuta Anima are sent to map the newly discovered island of Shinobi-Nui, and encounter the Toa Idiotas. The BZPower epic "Tales of the Makuta Anima", written by Master of the Anima: Ynot, takes place around this time.

Year 68,060

 * Maelstrom is captured by Liquid Ocelot, and is mutated into a bizarre Vortixx-robot hybrid.

Year 90,080

 * Blackout becomes Teridax's second-in-command.
 * Makuta Katawa begins his illegal experiments, and creates the Bount. Teridax orders Blackout to execute him, but in reality, Blackout simply drives the scientist to the point of near-death, and uses him as a source of energy for his secret lab.
 * The Bount are exiled to Earth.

Year 98,580

 * Makuta Ynot becomes the first known Makuta to leave Aqua Magna single-handedly. He spends the next one thousand years in another dimension, studying the universe. While there, he discovers many things.
 * Coincidentally, Caiaphus arrives at the same dimension in this year. He brutally murders a guard, and discovers the truth about his past and his destiny.

Year 99,080

 * Blackout first encounters Zev Raregroove.
 * Blackout discovers the Master Sword.
 * The Knights of the Blue Sky are assassinated by Blackout.

Year 99,580

 * Makuta Ynot returns from his travels around the universe, just in time to help Blackout fight Zev.
 * Uterio Di Armechio is named leader of the Knights of the Great Beings by Angonce.

Year 100,060

 * Malygos exiles Teridax to another dimension, allowing Blackout to take his place.

Year 100,079
(Note: The events of these six months were erased due to Blackout's use of the Vahi Cube.)
 * Icarax is assassinated at Blackout's order.
 * The Five Kings Treaty is signed, dividing up the universe between Blackout, Malygos, Duke Hydraxis, and two other kings, and preventing Blackout from proceeding any further with his plan.
 * The human scientist Monarch attempts to create an army to conquer the universe by kidnapping super-powered beings. When he captures Kakamu, Blackout hunts him down and kills him.
 * Blackout hires the ex-Dark Hunter Voporak to steal the Kanohi Vahi, Mask of Time. Kakamu, unaware of the identity of Voporak's employer, tries to stop him, but is stopped by Blackout revealing himself. Blackout creates the Vahi Cube.
 * The Icarus satellite weapon is created. Malygos immediately attempts to sabotage it.
 * The Fallen tries to free himself from his dimensional prison with the help of fellow Heralds of Unicron Xintun and Xaaron. He succeeds in doing so, but Ynot destroys his body soon thereafter.
 * The Toa-Skakdi war is instigated by Kakamu, at Malygos' request.
 * Blackout uses the Vahi Cube to rewind time by six months.

Year 100,080

 * Blackout swiftly takes over the Matoran Universe, and brainwashes the Matoran into building Darkmount.
 * Blackout contacts Le Chiffre's tribe of Agori and Glatorian, and offers to help them get revenge for their persecution at the hands of the other Bara Magna tribes.
 * Le Chiffre, having obtained weapons from Blackout and Minuteman, begins to prepare for war.
 * The Icarus satellite weapon is rebuilt.
 * Earth and Bara Magna are destroyed using unstable hadrium, and two and a half billion people on Coridan VI are killed when Darkmount attacks it.
 * The few remaining Makuta remaining loyal to Icarax are eliminated, leaving Blackout as the undisputed leader of the Brotherhood of Makuta.
 * The Battle of Impel Down occurs, and Blackout and his entire fleet are trapped in the Muta-Gaath Nebula by a Goa'uld core bomb.
 * Caiaphus kills SM Klak, and is chased by SM Tahar'ok for 40,000 years, then returns to the main universe to Krustallos, where he reunites with Nadle and his Shadow Toa army.
 * Ynot leaves the Makuta Anima and spends 50,000 years afloat.

Year 149,454

 * The Krustallos colony is destroyed, and Jorten is tormented. Caiaphus's body is destroyed by Tahar'ok, and the Apprentices of Caiaphus form, spending the next 626 years training.

Year 149,780

 * The Apprentices attack a Blackout loyalist base. Their numbers are decimated, leaving a select few. Reformation, and Caiaphus's physical return follow.

Year 149,882

 * The events of Subnixus - The Changing Planet take place.

Year 149,980

 * The Agrippa form an alliance with the Vassila. The Agrippa give the Vassila desperately needed food, and in return they give them drones to help build their houses.
 * Kensa, Jarvis and Etende appear in the middle of their home planet's desert as a result of a teleportation accident. From there, they begin a journey with Jubei that would change them forever.

Year 150,003

 * Human forces ravage the planet of Archon-7 with nuclear bombs, clearing the landscape with the intention of repopulating the planet in their own image.

Year 150,033

 * "Subject 08" is taken prisoner by the Knights of the Great Beings.

Year 150,080

 * Ynot returns from his isolation
 * The Galactic Federation has been formed.
 * The Matoran species has colonized Impel Down and renamed it Mata Nui II, in honour of the Great Spirit.
 * The seal placed on the Muta-Gaath Nebula 50,000 years earlier shatters, freeing Blackout and his army.
 * Klak meets Zev, and later, TMV, and approaches Caiaphus's temple, becoming part of the Apprentices
 * Much later, he leaves the group, and begins to fight with them in many conflicts, including the Battle of Conquistadores v. Apprentices of Caiaphus.
 * Blackout goes on a massive rampage throughout the universe, eventually ending in the activation of the Pandorica and the slow destruction of the BZPB universe.

Year 150,081

 * Blackout and his armies cross over into the BZPower universe, destroying a lot of stuff, heavily wounding the Architect, and running away from Unicron.
 * Unicron and Primus have a huge fight.
 * Apprentices of Caiaphus have dwindled to minuscule numbers, Caiaphus feared dead. Original AoC is later disbanded.
 * Blackout activates the Chamber of Secrets, and uses it to destroy Unicron and drain his powers.
 * F-Klak reveals himself to Klak at some point in this year.
 * Using his new Unicron powers and a gigantic body built from Darkmount parts, Blackout attempts yet again to destroy the Architect and lay claim to the Keruvim, but is stopped when Kakamu sacrifices himself to destroy his new body.
 * Uterio Di Armechio convinces Angonce and most of the Council of the Great Beings to declare war on the universe.

Year 150,082

 * The Uterio War rages across the BZPB multiverse, and is eventually brought to an end at the Battle of Mordor.
 * Osseron, previous Uterio War veteran, joins ZFT in the latter period of the war.
 * TPK takes over the Council of Great Beings, and violently suppresses opposition to his rule.
 * The Battle of the BZP Staff HQ occurs, leading to the overthrow of Black Six. Without a compliant ruler, the Great Beings lose influence over BZPower.
 * The New World Order Arc begins, showing the rise of Ultron, the ZFT, MECH, HYDRA, and the return of Caiaphus and Rahn.
 * User Sarge messes with his powers and goes back in time. He then returns to his own time, and begins his adventures around the multiverse, discovering more about the history behind BZPB.

Year 150,083

 * The ZFT attacks Cold Ground. During the battle, Blackout is possessed by an unknown force, which leads him to surrender to Malchiorian forces before going dormant.
 * Blackout is imprisoned on Malchior IV. Brotherhood forces attack the prison and free him, but are then forced to merge into a monolithic titan under TPK's control. The titan attempts to kill Blackout, but is destroyed. The overlord disappears, and the Makuta are imprisoned on an asteroid near Malchior.
 * The Platinum Lantern Corp is formed.
 * Ragnarok occurs. Caiaphus, Ultron, and F-Klak all perish, but so do most of Klak's friends. Klak himself is narrowly saved by a time-travelling Ynot.
 * Malygos attends the Mad Scientist Convention, marking his first appearance in many years.
 * Blackout teams up with Ra, frees his forces from the asteroid prison, and retreats to Ailyb-Gypte.

Year 150,084

 * A crack team of mercenaries breaks into Supermax 429 and manage to escape with two of its prisoners. Fourteen flies Tiff Ramson to Liquid-Metallicon, but Lalli Cain betrays the group and kills Ramson before flying away with a jetpack. Aluren delivers Iris to Malygos on Dominaria.
 * Yon's Dong Squad is formed. On their first mission, they enter Ipomal, Teruga Prime's capital city, via an abandoned cave entrance under the sea. They then storm the city's prison and No Image Guy murders Vok while controlling the armour of a ZFT soldier. As it appears that the ZFT killed the last important Terugan authority figure, a civil war breaks out on Teruga Prime between the Terugan people and the ZFT.
 * The last surviving members of the Reformed Second Brotherhood of Makuta (who have been in a deep sleep since the Uterio War) are awakened by a telepathic call from Ferox. They are Starok, Kulnak, Ordak and Kuli. Making plans for their future, they locate a recently resurrected Caiaphus and take him to Fareste, where they create a new set of Makuta armour for him. They also take Vultraz from the Mata Nui II and use him to create several new Makuta consciousnesses - ironically, he is absorbed shortly after by one of them with armour. Kuli is also killed by a swarm of Parasitic Fluff before the Makuta destroy it.
 * Malygos uses Iris as a channel to absorb all of the ambient magic in the universe, causing him to ascend to a being of pure magical energy. He declares himself Emperor of the Universe, and cripples Blackout before exiling him.