65,000,000 years ago-

The great dinosaur extinction occurs when a meteor impacts the Earth. Several species of dinosaurs survive, but the dominant giant monsters of Earth are driven underground. Among these first kaiju are a kaiju that would come to be known as Legendary Godzilla, along with the monsters Spectra and Tarantula.

55,000,000 years ago-

An unidentified alien vessel crashlands on Earth, and the occupants emit a tachyon distress signal.

100,000 years ago-

The 3 headed dragon King Ghidorah attacks the Earth, and is opposed by Mothra, a giant butterfly kaiju created by the Earth itself, and Legendary Godzilla. Together, the two kaiju are able to drive the 3 headed dragon off the planet, and the 3 headed dragon would be left to lick his wounds for the next several thousand years.

80,000 years ago-

Legendary Godzilla fights the kaiju JYARUMU in Siberia, ultimately trapping him in ice.

12,000 years ago-

The ancient civilization of Mu creates a weather control machine, and this wounds the spirit of Earth enough that it creates a dark Mothra called Battra which destroys the muans. In order to save itself, the device converts into a kaiju dubbed RAZIN. Mothra and Battra team up to defeat Razin, which they do, but their battle causes Mu to sink into the ocean.

2,000 years ago-

The giant monster BAGAN is born in China, and is one of the most powerful monsters in history. But one day, he is plucked out of his time period by aliens, who bring him to their time to use as their ultimate weapon in their invasion of Earth.

Ancient Japan-

The kaiju BALZARDAN is sighted on a few rare occasions, giving birth to the myths of Kirin and Raijin.

1945-

On the eve of Japan's surrender in the second world war, naval captain Hachiro Jinguji deserts the Japanese army, leaving his 3 year old daughter Makoto in the hands of his superior officer Admiral Kusumi. Their submarine is later ambushed by muan submarines, and they barely manage to escape before it is destroyed. Presumed dead, the crew begins working on a flying super submarine dubbed the Gotengo for if Japan ever resumed military activity.

1954-

A nuclear bomb test mutates 2 dinosaurs slumbering at the bottom of the sea into Godzilla I and II. While Godzilla II departs for parts unknown, Godzilla I begins attacking Japanese fishing vessels. After being discovered on the Japanese Odo island, the JSDF attempts to kill him with depth charges, but that only makes Godzilla madder, him emerging in Tokyo and destroying the entire city. The monster king is ultimately killed by the Oxygen destroyer, whose creator, Daisuke Serazawa, chooses to die as well to prevent his weapon from being used by world governments. Afterwards, Godzilla's energy is harnessed and used as a new power source for Japan, which even exceeds nuclear energy, and is dubbed G-energy.

1956-

An American film company attempts to make a monster movie about a giant doctor Serizawa that had been mutated by his use of the Oxygen Destroyer and attacked Tokyo. However, this movie was never made due to protests from the Yamane family and the Japanese government. Instead a movie about an evil alien robot called Mechatron is made.

1963-

The muans launch a formal attack on the surface world in an attempt to reclaim it. In response, the now retired Kusumi reaches out to Jinguji to get him to help with the Gotengo, but he refuses. However, when Makoto and photographer Susumu Hatanaka are kidnapped by the muans, Jinguji has a change of heart and sends the Gotengo to Mu. After rescuing the captives, the Gotengo battles the muan's monster god Manda, freezing him and then destroying the city, ending the muans for good.

1968-

Atomic testing in the French Polynesian Islands mutates an iguana on the island into a kaiju, which would grow for the next 30 years.

1984-

After being awakened by a volcanic eruption, Godzilla II destroys a fishing ship, and then a soviet nuclear submarine, causing him to grow to 65 meters. The government tries to hide his existence at first, but the Soviet nuclear submarine's destruction threatens to start a war, so they have no choice. Godzilla next attacks a G-energy generator, and absorbing its energy causes him to grow to 80 meters before following a flock of birds away. He next attacks Tokyo, fighting and destroying the super-X defense vehicle. Afterwards, he is lured to Mount Mihara by a bird call device and trapped.

1985-

After accumulating energy for a year, Godzilla explodes out of Mount Mihara, making landfall in Tokyo and laying waste to the city. The Gotengo is sent to stop him, but fails utterly. After completely annihilating the city, Godzilla returns to the sea. Afterwards, the anti-kaiju organization G-force is formed to stop Godzilla when he inevitably appeared again.

1986-

An alien race launches an expedition to Earth in preparation for an invasion, and stumbles upon the legendary infant island and two tiny fairies called the shobijin, who were the priestesses of Mothra. The aliens kidnap the shobijin, and a larval Mothra hatches to save them. Mothra heads to the alien's earth base, but on the way is confronted by Godzilla, who had sensed the approach of a new kaiju. Mothra manages to trap him in silk, and after a long run, forces the aliens to flee and gets the shobijin back, returning to infant island.

1988-

To cash in on the hype for Ghostbusters 2, the company who created the Mechatron movie revives the character and pits him against "Mister Mirengie", a not so subtle homage to the staypuft marshmallow man. The movie does fairly average at the box office, but this is the last Mechatron movie that would ever be made.

1992-

After several years of nothing, new giant monsters suddenly begin popping up all over Japan, being the giant ankylosaur Anguirus, the giant pteranodon Rodan, the burrowing monster Baragon, and the pollution monster Hedorah. Even Godzilla, who had sensed the mass kaiju awakening. Humanity fights back with the Super-X2, which had a fire mirror that could deflect fire attacks. However, humanity surprisingly gains aid from Mothra, whose egg they had found. At this point, Mothra was an imago. Ultimately, King Ghidorah returns, taking advantage of the chaos to attempt to destroy Earth, only for the humans and kaiju to team up and drive him off. Afterwards, the kaiju all return to slumber.

1993-

The aliens that kidnapped the shobijin in 1986 return, mind controlling both King Ghidorah and Battra, as well as building a Mechagodzilla. In response, G force locates Godzilla at the bottom of the sea, and using an operation box created by G-cell expert Professor Ogata, takes control of Godzilla, making him fight the other kaiju. Godzilla is also injected with King Ghidorah's cells to power him up. After defeating Mecha-King Ghidorah, Godzilla comes face to face with Bagan, who had also been injected with both Godzilla and King Ghidorah cells. Godzilla is converted into the mighty Super Godzilla to face him, and ultimately wins. However, the operation box is destroyed in the process, and Godzilla returns to the ocean, now back to normal and freed from control.

1995-

Jyrammu is released from the ice by global warming and heads to Bejing, destroying the city before being confronted by Mothra. After a short fight, Mothra kills Jyrammu and returns home to infant island.

1996-

A space monster called Dogolas arrives on Earth, being swiftly confronted by Godzilla. After a short battle, the king of monsters emerges triumphant and kills Dogolas before returning to sea.

1997-

The iguana kaiju that had been mutated in 1968 begins attacking American fishing vessels. Believing Godzilla to have migrated to the United States, the government starts giving their soldiers "G-combat training", which puts them in a virtual dimension where they are pitted against monsters along with normal enemies. In addition, the humanitarian environmental analysis team, or H.E.A.T, is founded, led by doctor Niko "Nick" Tatopoulus. Their goal was to study Godzilla and learn potential weaknesses.

1998-

The iguana kaiju arrives on US shores, and it is quickly learned that this wasn't Godzilla, but rather a new kaiju dubbed ZILLA. Zilla roams through Manhattan, and when the military is called in, she flees rather than fighting back. Once she arrives in the sea, Zilla is killed by depth charges. However, before her death Zilla had laid 228 eggs in Madison square garden, and HEAT and other soldiers are sent to clean them up. During the skirmish, one of the baby Zillas imprints on Nick before fleeing. Once all the other Zillas are killed, the soldiers and H.E.A.T leave.

1999-

The Crackler, an electric kaiju created from the brainwaves of a man named Sydney Walker, begins attacking New York city. Shockingly, the now fully grown Zilla Jr arrives to fight him, possessing a fireball attack his mother didn't have. Zilla Jr defeats the Crackler, but even after proving himself to not be a threat, the military attacks him, but not under orders. After this, Zilla Jr is officially made a member of HEAT, and goes on to defeat many more monsters. Eventually, HEAT discovers that Cameron Winter, the CEO of Solstice technologies, had been behind the military attacks on Zilla Jr. after defeating Cameron's solstace weapons, ZIlla Jr destroys his island facility, and returns to New York with HEAT.

2000-

The aliens within the downed spaceship finally awaken, and create 3 kaiju of their own: El Gusano Gigante, the Cryptocledius, and the giant Bat. These kaiju are sent to attack humanity, but Zilla Junior defeats them all, now having evolved a green atomic breath. HEAT heads to the alien's ship, where they unleash their ultimate weapon, the cybernetically augmented body of the first Zilla. Zilla Junior ultimately defeats his mother, and the aliens are forced to retreat, never to return. The alien's base, Site Omega, is then converted into a monster island, where the new kaiju are contained except for Zilla.

2001-

At the request of and with the aid of the Japanese government, the US government begins placing the Japanese kaiju on monster island too. Baragon is defeated by Zilla Jr and airlifted to the island, and Anguirus is transported to it thanks to being knocked out by sleeping gas. Rodan is lured to the island, and Zilla Junior has to sacrifice himself to get Godzilla on the island. Heodrah was considered toxic to the kaiju, and Infant island's exact location was still unknown. Thanks to barriers and other defense mechanisms on the island, the kaiju stay on the island for the most part.

2002-

The vortaak aliens make their attack on Earth, taking control of most of the monsters on monster island and sending them to attack cities across the globe. The only one able to avoid control is Godzilla, who begins fighting the controlled monsters. After defeating them, Godzilla is teleported into the vortaak mothership to be killed by their ultimate weapon: Mechagodzilla. Godzilla manages to defeat his robotic double, and the vortaak teleport him home, vowing revenge.

2003-

A meteor simply dubbed "Meteor X" crashes on Earth and causes all of the kaiju to go berserk, leaving monster island and rampaging once again. Godzilla and Mothra both stop the kaiju, but slowly begin losing their minds too. Ultimately, Godzilla confronts the mastermind behind this, another, truly massive Mecha-King Ghidorah. Godzilla and Mothra barely manage to defeat him, and all of the kaiju return to monster island.

2004-

The vortaak launch another invasion of Earth, this time having a cyborg kaiju called Gigan. They use the same control plan as before, and once again Godzilla breaks free from control. After defeating the controlled monsters, including Gigan, Godzilla battles a kaiju created by the vortaak from his cells, which they called Spacegodzilla. Godzilla blasts off his double's shoulder crystal, creating a black hole which sucks Spacegodzilla in. Afterwards, a heavily wounded Godzilla collapses into the sea, going into hibernation.

2013-

Spectra and Tarantula are accidentally awakened by an american weapon test, and attack San Francisco. Legendary Godzilla appears to stop them, while a HALO jump team is sent in to save anyone caught in the crossfire. After Legendary Godzilla defeats the two kaiju, he returns to the sea.

2014-

Godzilla reawakens, and seeking energy, begins feeding on every G-energy generator in Japan. G-force throws everything they have at him, even a new Mechagodzilla made around the skeleton of the original and called Kiryu, but nothing works, and all the G-energy in Japan is drained. However, this ends up overloading Godzilla, and he becomes Burning Godzilla, his power threatening to destroy the planet. Legendary Godzilla returns to stop him, but is killed in the process. Luckily, G-force is able to freeze Godzilla, and Kiryu takes him out to sea, dropping him in along with himself.

2019-

Earth is attacked by another alien race calling themselves the Xillians, who use their own monsters to attack humanity. Thankfully, humanity manages to triumph over the Xillians, and send them packing, with them deciding to bide their time until humanity achieves space travel and becomes a threat.

2024-

Crystals fall to earth from the sky, causing weather shifts and earthquakes, and making the kaiju go berserk. Godzilla is awakened by the energy of the crystals, busting out of his icy prison and freeing monster island from the crystal's effects. He then travels to Seattle, battling and defeating the lava monster Obsidius. The crystals also drive the new Gotengo captain, Admiral Gyozen, insane, forcing Godzilla to kill him. After he and Mothra destroy more crystals, Godzilla defeats the kaiju Krystalak, whose destruction nearly causes Spacegodzilla to break free. Luckily, Godzilla manages to kill him using the power surge provided by his crystals.

2025 to 2187-

All of Earth's governments unite into a single Earth Union, expanding and forming colonies across the solar system.

2188-

Pluto and Neptune suddenly switch places in the solar system, which is caused by the Xillians, who declare war on Earth. Humanity uses teleporter technology to take their most powerful kaiju, Godzilla and Mothra, and send them against the XIllian's legion of space monsters. During these battles, Gigan, who had previously attacked Earth in 2024 alongside the vortaaks and had been upgraded, is destroyed for good. Ultimately, Godzilla and Mothra fight a cloned King Ghidorah on Planet X and kill him. The Xilllians vow to get revenge someday, and Godzilla and Mothra are brought home.