Short answer: According to the material, Tiamat was destroyed approximately 12,500 years ago as collateral damage from a massive space battle — not by deliberate intent. The reptilian forces set up a fictitious base on Tiamat transmitting decoy signals to lure the Federation into an ambush. A large Federation combat fleet led by Taygeta fell into the trap, and the ensuing battle was of such scale that weapons of mass destruction — zero-point and thermonuclear — destabilised the planet itself. The shockwaves from the battle disrupted Tiamat's great ocean, deviated its magnetosphere, and the planet broke apart. Neither side intended to destroy the planet; it was the catastrophic side-effect of weapons that exceeded what any planet could absorb. The destruction reshaped the entire solar system, caused the Great Flood on Earth, and led directly to the installation of the 3D Matrix.
What Tiamat was
Tiamat was a very large planet, approximately eighty percent the size of Neptune, positioned closer to Earth than Mars is today. It was a water planet with few islands and was so luminescent — reflecting the sun across its vast oceans — that it appeared as a second sun from Earth's surface (Transcript 138).
Swaruu described this dual-sun appearance as the source of myths about two suns found across multiple cultures: in the Sumerian tablets, Chinese and Japanese records, and the Mayan Popol Vuh. The modern Nibiru myth is a distorted memory of Tiamat — not a missing planet that will return, but one that was destroyed (Transcript 138).
In the antediluvian world, Tiamat hung in the sky where the moon is now. Saturn was visible with horns but no rings. Earth was covered in dense forests with vast plains, few seas, and many lakes (Transcript 125).
Tiamat was also an inhabited world. It was a water-dominated environment comparable in nature to Sirius, where aquatic and semi-aquatic species were predominant. Dolphins and cetaceans were among the species seeded on Tiamat, Earth, and Taygetan worlds by the Sirians (Transcript 119). The planet was part of the broader interstellar ecology of this solar system.
The ambush
The destruction of Tiamat occurred in the context of the war between the Federation and the reptilian forces that had invaded Earth, enslaved the Lyrian population, and established the civilisation of Atlantis. After the Taygetan women of Lemuria freed the enslaved Adamic race from Atlantis — the event encoded in the Genesis story — the enraged reptilians launched a war of extermination against what remained of Lemuria (Transcript 138).
The reptilians knew the Federation was on its way to investigate the loss of contact with the Lemurian base and the Lyrian colony. Rather than face the Federation directly, they set up a fictitious base on Tiamat, transmitting decoy signals designed to draw the Federation fleet into an ambush (Transcript 138).
A large combat fleet led by Taygeta entered the solar system and went to Tiamat to investigate the signals. They fell into the trap. Swaruu described the resulting battle as tremendous space combat of epic proportions even by today's standards (Transcript 138).
The destruction
The battle resulted in the destruction of more than seventy-five percent of the forces on both sides — a catastrophic loss for both the Federation and the reptilian alliance. Weapons of mass destruction were used, including zero-point energy weapons and thermonuclear weapons. These destabilised the planet Tiamat itself, creating shockwaves in its great ocean that resulted in the deviation of its magnetosphere and ultimately the destruction of the planet (Transcript 138).
The material frames this as collateral damage, not a deliberate act. Neither the Federation nor the reptilians intended to destroy an entire planet. The scale of the weapons used in the confined space of a planetary engagement produced effects beyond anyone's control. Swaruu stated that for us nothing justifies the destruction of an entire planet and a lot of species karma is carried for that (Transcript 138).
Consequences for the solar system
The destruction of Tiamat created cascading effects across the entire solar system. The sudden removal of such a massive body disrupted the delicate gravitational dynamics between all the planets, forcing a new orbital distribution of all the stars — meaning all the planets rearranged their orbits (Transcript 138).
The surface of Mars was devastated by the battle and subsequent cataclysms. The inhabitants of Mars, who survived, moved predominantly underground where they remain to this day (Transcript 138).
Earth, being closer to Tiamat than it is to Mars today, received the most devastating impact. The water from Tiamat's vast oceans — an enormous water planet nearly the size of Neptune — partially fell onto Earth, creating the Great Flood recorded in mythologies worldwide. The deluge submerged five continents that no longer exist: Appalachia, Fennoscandia, Oceana, Tirandia, and Beringia. It destroyed both the Atlantean and Lemurian civilisations simultaneously. It caused a pole shift due to the alteration of magnetic fields. And it reshaped the continents into their current configuration (Transcript 138, Transcript 125).
This is the event behind the legend of Noah's Ark. The Taygetans, knowing the cataclysm was coming, built three arks — not wooden boats but high-technology genetic containers holding DNA samples of Earth's biology in nano containers. Yazhi described them as built before the Tiamat cataclysm to preserve the living library of Earth. Three were constructed for redundancy: one kept under Giza, one in Sumeria under the Federation starport at Alt-Ur, and one guarded by Taygetan forces (Transcript 179).
The 3D Matrix
In the aftermath, the Federation was severely weakened. Having lost more than three-quarters of its combat capability, it chose an emergency measure: installing an electromagnetic containment barrier around Earth, projected from a damaged Andromedan biosphere ship that was placed into orbit — the Moon. This barrier, manifested through the Van Allen belts, created the 3D Matrix (Transcript 138).
The intention was temporary containment — preventing the surviving negative reptilians from escaping into the wider galaxy while the Federation recovered and determined how to deal with them. But the containment system also trapped the surviving Lyrian population, the freed Adamic race, and every other being on Earth within its frequency-suppressing field. The reptilians, adapting to the new conditions, began using the Matrix frequencies for their own purposes of mind control over the human population (Transcript 138).
The pyramids were later constructed as part of a system to counteract the lunar Matrix from the surface — a mechanism to potentially remove the frequency suppression without having to go to the Moon itself. But they were eventually disabled by the forces that had co-opted the Matrix for control purposes (Transcript 142).
The ongoing war
Swaruu described the destruction of Tiamat and everything that has followed as the continuation of the Orion Wars — the same conflict that began approximately one million years ago when the reptilian forces invaded Lyra. The wars are not over. They are ongoing today. The difference, she stated, is that now the Federation has superiority over the regressive Reptiles (Transcript 138).
The current situation on Earth — the Cabal, the Vatican, the suppression of history, the manipulation of consciousness — is all part of the aftermath of Tiamat's destruction and the failed containment strategy that followed. The 3D Matrix that was meant to be a temporary prison for the negative forces became the instrument of humanity's imprisonment, and the effort to undo that situation is what the Taygetan presence in orbit is about.
Sources: Transcript 119 (Extraterrestrial Races: Sirians — Swaruu of Erra), Transcript 125 (Extraterrestrial Races: Agarthians — Swaruu of Erra), Transcript 138 (Atlantis, Lemuria, Reptilians, Adam and Eve, Tiamat — Swaruu of Erra), Transcript 142 (Pyramids — How Were They Built and What Do They Serve — Swaruu of Erra and Yazhi), Transcript 179 (Ark of the Covenant — Yazhi Swaruu)
Speakers cited: Swaruu of Erra, Yazhi Swaruu