Sera being hit by the HoD counterattack.

Sera was a habitable planet that was the homeworld of the humanity. The planet had a 26-hour day.[1] The topography consisted of a few very large, contiguous continents surrounded by the Serano Ocean, as well as several small island chains.[2] Beneath the surface of Sera existed The Hollow, a honeycomb of tunnels and caverns permeating the planet's crust that was the home of the Locust Horde and the Lambent. Sera also possesses two moons.[3]

Sera had a history of conflict that took it and its inhabitants to the brink of destruction. This shocked the people into a rejection of their destructive ways, leading to a golden age. Although most conflict was solved peacefully, civil liberties and crime remained as troublesome social issues. A golden age of peace, culture, science, and the arts ensued, yet one problem still stood prominent: energy. Sera's sources of fossil and nuclear fuels were not sufficient to meet the rising global demand.[1]

Imulsion, with its promise of near limitless energy, was thought to be the solution to mankind's increasing need for energy and quickly became a key power source.[2] However, the discovery of Imulsion caused a shift of political and economic power as well, instigating war between those countries fortunate enough to have large Imulsion reserves and those which were not. The conflict that ensued, known as the Pendulum Wars, raged on for 79 years.

Pre-Emergence Day, Sera was host to many cultures and nations, including the world's two competing superpowers: the Coalition of Ordered Governments (COG), and the Union of Independent Republics (UIR), each a powerful alliance of multiple Imulsion-rich states and their allies.[4] With the COG's victory in the Pendulum Wars, it claimed control of almost every country on Sera, minus a handful of stubborn holdouts such as Gorasnaya. Emergence Day introduced humanity to the genocidal Locust Horde, and the ensuing Locust War obliterated most countries and almost brought humans to the edge of extinction.

History of SeraEdit

Age of ArmageddonEdit

Sera has a history of conflict that took the planet to the brink of destruction. The "Age of Armageddon" was a millennia-long global conflict which nearly destroyed the human race.[5] At some point, the people of Sera rejected their destructive ways and the very concept of war, ushering in an era of peace and prosperity.[5]

Silver EraEdit

" Five centuries ago, we won and lost an empire of four hundred million citizens."
— Miran Trescu.

The Silver Era was an era of sword and chariot-based warfare. Kashkur and Gorasnaya both founded empires during this era and conquered the lands around their native homelands. For both empires it was their golden age: Kashkur they used their silver mines to fuel their empire and built Anvil Gate to protect their southern borders from enemy invaders; the Gorasnanya Empire controlled a population of four hundred million, before losing control and receding to its original borders.[6] The city of Ephyra during this time was only a village with homes made out of manure.[7]

Era of SilenceEdit

The Era of Silence was a period of uninterrupted peace that lasted until the Pendulum Wars. Although most conflict was solved peacefully, civil liberties and crime remained troublesome social issues even in a Golden Age of culture, science, and the arts.[8] Yet one problem stood prominent above the rest: energy. Sera's sources of petroleum and nuclear fuel were not sufficient to meet the global demand. Imulsion, with its promise of near limitless energy, was thought to be the solution to mankind's greatest need.[9] The era ended with the onset of the Gold Rush.

Pendulum WarsEdit

Following the perfection of the Lightmass Process, the hope that cheap energy would perpetuate the Golden Age was shattered. The global economy crumbled, leaving only the few nations with access to Imulsion unscathed. Nations without Imulsion, faced with an economic collapse and utter ruin, decisively launched an invasion against their neighbors to obtain that key resource; once again, Sera was going to war. The battle lines were drawn between the Union of Independent Republics and the Coalition of Ordered Governments. The seventy-nine year war, which would be referred to as the Pendulum Wars by the whole of Sera, almost destroyed both factions and Sera itself, with the reemergence of weapons of mass destruction.[10][11]  The environment was significantly damaged and several cities were completely leveled, as seen with the city of Berephus during the prelude to Operation: Leveler when a  COG Navy unit bombarded the city.[12] There were some areas that were completely devastated by the war, just torn apart and scorched from gunfire, cannons, missiles, bombs, other conventional weapons, and the aforementioned reemergence of the use of weapons of mass destruction. After the battle of Aspho Fields, the Pendulum Wars came to an eventual close, with a heavy price on the people of Sera. It seemed that under the Coalition of Ordered Governments, Sera could enter a second Golden Age.

Emergence Day and AftermathEdit


Sera from the orbital view of a HoD satellite in the aftermath of the HoD strikes.

Nearly 79 years after the Pendulum Wars began, almost all human cities came under surprise attack by the The Locust Horde, who killed over a quarter of all human life on Sera within the first 26 hours: an attack now known as E-day. The COG sent several million humans to Jacinto Plateau, one of the few safe refuges on the planet. They then proceeded to scorch and destroy the planet with chemicals and satellite fire in order to prevent the Locust from inhabiting Sera’s surface, killing billions more humans and stranding the survivors.

Sera’s surface is littered with the ruins of destroyed cities and war-scorched battlefields. Some humans, known as "Stranded", still inhabit Sera’s fallen cities. Despite small patrols of Locust forces, the planet is relatively safe by day. Night is another case: the planet’s skies were filled by swarms of deadly bat-like creatures known as the Kryll. They attack and devour any living creature that wanders into the darkness, even Locust. Thankfully, since the Lightmass offensive at Timgad Valley, the majority of the Kryll, along with the Outer Hollow, were destroyed.

Towards the end of Operation Hollow Storm, the last human safe point, Jacinto, was sunk by the COG so that the Inner Hollow would be flooded with seawater. It was the COG's hope that this act, while a serious blow to the humans, would completely destroy the Locust.

By the 15th year of the war it is believed that up to 99% of the human race was killed in the war.[13] With the Remnants of the COG heading towards Port Farrall, an old port city. The Coalition set it up as the new capital of the COG, but sub-zero weather, defection to the Stranded, and Locust raids forced from what little appeared to remain of the Horde forced the COG to relocate to the Lesser Islands chain where there was an old abandoned military based called Vectes Naval Base which still housed a small COG community of civilians and was safe from Locust attack due to an abyssal trench. After reclaiming the forgotten island and destroying the local Stranded group, the COG discover the remnants of the UIR, hailing from the Gorasnaya. The UIR negotiated with Chairman Richard Prescott to join what was left of the COG in exchange for Imulsion.

Despite the Stranded Insurgency, things worked fine for a few months until a new, worse enemy than the Locust emerged: the Lambent, mutated creatures mostly of Locust origin who became infected with Imulsion and started a Civil War with the Locust that they were winning. This was what was forcing the Locust to the surface and started off the Locust War. The Lambent proved to be a hard foe to deal with as there were many different types and unlike the Locust, they were able to invade the safe-haven of Vectes island. The threat of the Lambent Pandemic led to the end of the Stranded Insurgency and the uniting of the Stranded and the COG to defend Vectes after which the Stranded abandoned the island. Ultimately the Lambent invasion forced the COG to abandon Vectes and the COG disbanded while the Gorasnayains went their own way to try to survive in what was left of their homeland.

Eighteen months later, Chairman Richard Prescott returned from his disappearance and brought a message for Marcus Fenix from his believed dead father Adam Fenix, revealing he'd developed a weapon to kill Imulsion which is revealed to be a living, parasitical, organism and all those heavily infected by it such as the Lambent and the Locust.

At the Second Battle of Azura, the combined forces of Delta Squad and Gorasni reinforcements battled the remainder of the Locust army and the Lambent. Adam deployed his weapon; which killed all the Locust and Lambent and finally brought peace to Sera.

Postwar and the SwarmEdit

With the Locust Horde and the Lambent apparently extinct, humanity quickly reclaimed control over Sera, and the Coalition of Ordered Governments was eventually reformed as the dominating government over the surviving population. However, the war had left less than a million humans alive, and virtually everything of their civilization had been lost in the war. Reestablishing themselves in the former nation of Tyrus, the COG began an aggressive reconstruction process, constructing the city of New Ephyra as its capital and constructing dozens of new settlements for the recovering population. After twenty-five years, humanity's numbers were again in the millions, but most of their former cities remained abandoned and in ruins, with much surviving infrastructure neglected. Those who did not recognize the COG's authority became known as the Outsiders, who lived beyond the COG's settlements and staked out a living in Sera's recovering wildlife. Humanity was also left at the mercy of Windflares, a violent weather phenomenon many believed to be created by the countermeasure's effects, forcing the COG to create protective barriers to ensure the survival of its new settlements.

Those Locust killed by the countermeasure were soon found to be covered in an impenetrable crystal, and with no other means to dispose of them, the COG buried them in hundreds of mass graves thousands of feet below the surface. Twenty-five years after the war, entire settlements began vanishing and the COG suspected the Outsiders of killing and enslaving their people. It was soon discovered, however, that the Locust had revived in their graves, reemerging as the much deadlier Swarm and capturing humans to violently convert into soldiers. The COG now finds itself at war once more with its former enemy.



Sera's vast environment.

Pre-Emergence DayEdit

The Seran environment was vast and diverse. A massive mountain range was in Eastern Central Massif, which included KashkurRepublic of Lauczi, and Vasgar. Pesang and the Shaoshi people were hill people that depended on the land and water. In the 62nd year of the Pendulum War, Pesang experienced a drought that had a negative effect on Pesanga people and their farmlands, but the lack of water did not give the Shaoshi a cause for another tribal war. In the South Islands and Lesser Islands chain existed vast tropical islands. In Tyrus, Jacinto Plateau, was a vast mountain range, full of life. A desert existed too on Sera.[14] The outer Hollow was dark and had an abundance of Imulsion and was mined by the humans. The Inner Hollows had greater life and more Hollow creatures including the Rockworm and Riftworm. The Inner Hollow included more biological life and included lakes where fish and Leviathans lived. Weather on Sera could reach extremes at times, such as Razorhail.[15] Tyrus forest was made up of a tree called Tyre Oak.[16]

Post E-dayEdit


After the HoD attacks, areas like Char became uninhabited

After the Locust invasion of the surface and the Hammer of Dawn counterattack, 90% of the Seran surface was destroyed by the Hammer of Dawn satellites and chemical weapons by the COG nation of Tyrus.[17][18] The attack created the Deadlands and turned a Human city into an area called Char. Areas outside of the mainland were spared including minor South Islands and some Lesser Islands chain (Vectes and Branascu).[18][19] Almost all of Sera except some regions Jacinto Plateau and several isolated islands was dead, Bernadette Mataki did not see any human settlement left from the attack when she reached the main continents from the South Islands, where some were spared from the HoD attacks.[20][21] Inside Jacinto Plateau, the natural environment stilled survived somewhat, with the Kryll killing anything at night from human to Locust and including animals, until their extinction in the Lightmass Offensive, which destroyed a mountain range and the Outer Hollows.[22] During Operation: Hollow Storm and the endgame of the Siege of Jacinto, the Inner Hollow was flooded, presumably drowning most hollow creatures along with any Locust inside, although many creatures used by the locust did survive the flooding. Around Port Farrall, winter was still hard hitting.

When the Lambent Pandemic spread to the surface, Stalks would emerge from the surface and attack anything non-lambent, invading the natural environment and killing sea creatures and taking over the center of Vectes Island.[23] The pandemic became global and the entire settlements and abandoned cities would be overrun by the Lambent at an alarming rate, while the Locust continue to stake out a living on the surface even without the leadership of their Queen. Eventually, the Lambent pandemic came to affect humans as well, approaching a critical stage where all life on Sera would follow in their wake.

Eventually the survivors of the now-defunct Coalition of Ordered Governments would learn of Adam Fenix's survival and plan to eliminate the Lambent problem by eradicating all traces of Imulsion worldwide, which was discovered to be parasitic in nature. Queen Myrrah and the remaining Horde took him hostage with the intent of forcing him to adapt his Imulsion Countermeasure Weapon to spare the lives of the Horde in destroying the Lambent. The Battle of Azura soon culminated with the fate of Sera hanging in the balance, with COG forces successfully overpowering the Horde and allowing Fenix to activate the weapon. The result was the complete extinction of the Lambent and the Locust Horde with them, with all traces of Imulsion effectively erased from the face of Sera, ending the war.

Postwar SeraEdit

The aftermath of the countermeasure's activation secured the survival of all remaining life on Sera, while leaving the world irreversibly scarred in its wake. The loss of Imulsion left Sera with no plentiful supply of fossil fuels, creating a new energy crisis as humanity sought new sources under the reorganized Coalition of Ordered Governments. Sera was also affected by Windflares, a weather phenomenon that generated massive wind storms all across the planet. With the Locust Horde no more, humanity has moved to reclaim and rebuild their shattered civilization.


  • Nations:
    • Dushin - A member state of the COG
    • Emgazi - A nation that bordered Kashkur
    • Erevall Island - On the far side of the abyssal trench.[24]
    • Independent Republic of Furlin - UIR nation that occupied Vasgar and invaded Kashkur
    • Ingarez - A nation that bordered Tyrus.
    • Kashkur - COG nation that had one-fifth of Sera's Imulsion supply
    • Lesser Islands chain - An group of Islands north of Jacinto Plateau
    • Maranday - Neutral nation that Indie saboteurs used as a safe haven to attack Sarfuth
    • Ostri Republic - A former member of the UIR; abandoned to the Locust Horde
    • Pelles - A former member of the UIR; destroyed by COG Hammer of Dawn offensive
    • Pesang - A nation affiliated with but not part of the COG
    • Gorasnaya - A member of the UIR; refused to surrender and mainland overrun by the Locust Horde. At least four thousands of its citizens relocated to the Lesser Islands chains[25]
    • Sarfuth - COG country that housed Imulsion supplies
    • Shaoshi - A nation that bordered and was somewhat hostile to Pesang
    • South Islands - All major Islands scorched by the Hammer of Dawn, minor islands communications cut off from the rest of the planet[26][27]
    • Tyrus - Founding nation and homeland of the COG; its capital city was known as Ephyra, which was also the capital of the COG
    • Vasgar - Neutral nation during the Pendulum Wars, invaded by Indie "peacekeepers"
  • Cities:
    • Jacinto - COG stronghold during the Locust War; sunk by COG forces to flood The Hollow
    • Landown - Occupied by Locust, reclaimed by the COG in Operation Hollow Storm
    • Ephyra - The capital city of Tyrus and the COG. Destroyed by Locust in 10 A.E., partially occupied by Stranded; likely destroyed with the fall of Jacinto
    • New Ephyra - The capital of the postwar COG, located in the reformed nation of Tyrus.
    • Tollen - Sunk by Rift Worm
    • Montevado - Sunk by Rift Worm
    • Ilima - Sunk by Rift Worm
    • Char - A former COG city situated in the Deadlands. Housed a sizable Stranded settlement.
    • Mercy - A former COG city nearby to Char. Was the first place where Lambent Humans were encountered.
    • New Sherrith - Most likely destroyed in the Hammer of Dawn Strike
    • Jannermont - A southern COG city, sacked by the Locust Horde
    • Andius - A city in southern Tyrus, sacked by the Locust Horde
    • Soteroa - A city in the South Islands; most likely destroyed
    • Berephus - A city in the Ostri Republic. Presumably destroyed or heavily damaged by CNV Merit naval assault.[28]
    • Peraspha - A city in the Ostri Republic. Flattened by COG Petrel missiles.[28]
    • Anvegad - A city lying on the border of Kashkur and Vasgar, home to the famed Anvil Gate fortress; occupied by COG and survived the war.
    • Hanover - A city in southern Tyrus, home to the Cougars and Cougar Stadium, sacked by the Locust Horde; housed numerous Stranded settlements
    • Port Farrall - A ruined city lying on Sera's coastline. The COG took refuge here after the sinking of Jacinto.
    • Pelruan - A city on the island of Vectes in the Lesser Islands. It was the fourth and final capital of the COG.
    • Nexus - The Locust Horde's capital and the only Locust city known to the COG. The Locust Queen's Palace was located here. It was attacked by both the COG and the Lambent and subsequently destroyed when the Inner Hollow was flooded.
    • Halvo Bay - The wealthiest city of the COG, burned to the ground.
    • Speyer - A major industrial COG city

List of ethnic groupsEdit

Behind the scenesEdit

3019089047 eb422d5a59

A non-canon map of Sera.


A globe of Sera.

  • Sera is Ares spelled backwards, the Greek god of war and son of Zeus and Hera. Though often referred to as the Olympian god of warfare, he is more accurately the god of bloodlust, or slaughter personified: "Ares is apparently an ancient abstract noun meaning throng of battle, war."[33]
  • Chris Bartlett, the Sr. Artist at Epic Games and Prop Maker, Actor (contractor) for Lucasfilm,[34] created a non-canon map of Sera using geography and borders from the Middle East and other parts of Earth with Star Wars-themed names, which can be seen briefly in a cut scene late in Gears of War 2.
  • On the Gears of War 4 multiplayer map Speyer, near the Planetarium, there is a stylized globe of Sera with its moons.

See alsoEdit


  1. Gears of War: Aspho Fields pg 20
  2. Gears of War: Aspho Fields pg 73
  3. Gears of War 2: Act 2: Denizens: Disturbing Revelations
  4. Gears of War: Aspho Fields
  5. 5.0 5.1 Destroyed Beauty
  6. Gears of War: Coalition’s End pg 67
  7. Gears of War: Coalition's End pg 172
  8. Gears of War 2 booklet
  9. Destroyed Beauty page 1
  10. Gears of War: Unsaid
  11. Gears of War: Promise Me
  12. Gears of War: Aspho Fields pg 162
  13. Gears of War: Jacinto's Remnant pg 214
  14. Nowhere map
  15. Gears of War 2 Gathering Storm: Rude Awakening
  16. Gears of War: The Slab pg 5
  17. Destroyed Beauty
  18. 18.0 18.1 Gears of War: Jacinto's Remnant
  19. Gears of War: Anvil Gate pg 24
  20. Gears of War: Jacinto's Remnant pg 232-233
  21. Gears of War: Jacinto's Remnant pg 202-203
  22. Gears of War
  23. Gears of War: Anvil Gate
  24. Gears of War: Jacinto's Remnant pg 157
  25. Gears of War: Jacinto's Remnant pg 382
  26. Gears of War: Aspho Fields pg 40
  27. Gears of War: Jacinto's Remnant
  28. 28.0 28.1 Gears of War: Aspho Fields pp282
  30. Gears of War: Anvil Gate
  31. Gears of War Act 5
  32. Gears of War: Jacinto's Remnant pg 182
  33. Walter Burkert, Greek Religion (Harvard) 1985:pt III.2.12 p 169