"Just received topside confirmation that Ilima City... damn it... the entire city is sunk, right at your location!"
—Lt. Anya Stroud reporting to Delta Squad the sinking of Ilima.

The Battle of Ilima took place during Operation: Hollow Storm in 14 A.E. Within the six months following the Lightmass Offensive, the cities of Tollen and Montevado are sunk underground by the Locust Horde, signaling to the Coalition of Ordered Governments that the Locust survived the bombing and Jacinto City was in danger of being sunk as well. The COG launched an underground assault against the Locust Horde in order to prevent the sinking of Jacinto and the other cities on the Jacinto Plateau. However, hours into Operation: Hollow Storm, the seismic activity was detected under the city of Ilima. It was soon discovered that the Locust were using the gargantuan Riftworm that was woken up by the Lightmass Bomb to sink Ilima City just as it sunk the cities of Tollen and Montevado.

Order of BattleEdit


One month after the Lightmass Bombing, the city of Tollen was mysteriously sunk. Soon after, the Tollen Dam was ambushed and occupied by the Locust Horde. The nearby city of Speyer, a manufacturing town for the Coalition of Ordered Governments Army lost power and evacuated all Gears, civilians and manufacturing to the city of Ilima.

In the following month, the city of Montevado began experiencing the same seismic activity that Tollen experienced before it sank. Delta-One was sent to investigate and evacuate the city. Montevado sank the same as Tollen. Following the sinking of Tollen and Montevado as well as the Siege of Jacinto City, the Coalition feared that Jacinto City was next to be sunk. Six months later, the COG devised and launched Operation: Hollow Storm, a massive assault against the Locust Horde by invading their stronghold and ending the Locust War once and for all.

Sinking of llimaEdit

"First Tollen, then Montevado, and now Ilima... and they all surround Jacinto..."
"Shit they're punching holes around Jacinto to sink it.
—Cpl. Dominic Santiago and Sgt. Marcus Fenix after the sinking of Ilima City.

Hours into invading the Inner Hollow, the same seismic activity was detected that occurred under Tollen and Montevado before they sank. COG High Command realized that a sudden increase in seismic activity could indicate another attack. While the Gears fought the Locust underground, the topside forces of the Coalition evacuated the civilians from the city as a precaution. Lt. Anya Stroud gave orders to Sgt. Marcus Fenix of Delta Squad to investigate the seismic activity under Ilima.

During the height of the assault on the Inner Hollow by the COG soldiers, the Riftworm, led by Ketor Skorge created a massive sinkhole by undermining the rock beneath Ilima and bringing the entire city down into it, killing hundreds of the civilians still trapped within the city. Immediately after the city was sunk, the Locust began to pour in to the ruined metropolis by using the Riftworm and several Corpsers to dig tunnels from the Hollow into the sinkhole, allowing their Drones to quickly overrun the ruins. The existing defenders left in Ilima were swiftly overwhelmed by the onslaught and the Locust rounded hundreds of civilians and Gears up for torture in the Beast Barges.

Battle of IlimaEdit

Delta Squad saw the destruction first hand and entered the sunken city after following the tunnels of the Riftworm. Fighting though the Locust patrols in the city, they found the city largely empty of human life with the exception of a handful of civilians. After a King Raven crashed into the ruins, Delta went to investigate, but were ambushed and only saved with the intervention of Pvt. Augustus Cole. The additional squads of Gears began deploying in the city. Delta led a charge through one of the Locust tunnels in search of Cpl. Damon Baird and Pvt. Tanner. However, Delta, along with the rest of the COG discovered that the Locust are taking human prisoners and taking them deeper into the Hollow to either be processed, a form of torture or enslaved in a labor camp.


Delta-One attacking a Locust Torture Barge.

Delta Squad failed to find Pvt. Tanner alive, but found and released Cpl. Damon Baird from captivity. Delta engaged the Locust by disrupting the enemy supply lines by striking at the Beast Barges which are large Locust barges ferrying the human prisoners. In a campaign to rescue the prisoners, Delta Squad found Cpl. Tai Kaliso who was last seen battling Ketor Skorge at Landown while the rest of the Gears deployed underground. Kaliso was captured by Ketor Skorge and tortured which led to his suicide by shooting himself with a Gnasher Shotgun.

With the ruined city largely in COG hands, Delta was assigned a mission by Col. Victor Hoffman and ordered an evac for Delta from the Ilima sinkhole. Delta managed to find a high enough structure for the King Raven to land. After planting the flare for the King Raven, the Locust forces sighted the flare as well and began an ambush on Delta Squad. The Gears managed to repel the Locust as the evac helicopter arrived. However, the Riftworm began to devour the remains of the city. A pile of rubble caused the King Raven to malfunction and drop Pvt. Benjamin Carmine into the mouth of the Riftworm. The rest of Delta, inside the King Raven were also swallowed by the Riftworm.


The Battle of Ilima was a tactical victory for the Coalition, but a costly one. One of humanity's few remaining refuges was compromised. Hundreds of men, women and children are lost to the darkness of the Beast Barges and the Inner Hollow while the granite base of the Jacinto Plateau was further weakened by the Riftworm's tunneling. The COG managed to drive the Locust from the city, but Ilima had to be abandoned as it became too exposed to the enemy attacks to be defensible. Still, Delta Squad from the inside managed to destroy the Riftworm. The loss of the Riftworm meant that any attempt by the Locust to sink Jacinto would be much more difficult and the Gears gained new, vital intelligence regarding the Locust strategy. Any surviving humans or Locust in the city are killed when the Inner Hollow was flooded by Delta Squad.



  1. Gears of War: Jacinto's Remnant pg 3
  2. COG forces only lose two King Ravens and one squad while the Locust lose dozens of Drones, Reavers and the Riftworm
  3. The Locust Horde was able to effectively "punch holes" around Jacinto, which lead to its downfall
Locust War
0 A.E. Emergence Day (First Battle of Jannermont · Battle of Mattino Junction · First Battle of Ilima · Battle of Porta Ogari · First Battle of Ephyra · Fall of Gorasnaya · Evacuation of Mercy) · Battle of Nordesca · Battle of Kinnerlake · Destruction of Halvo Bay (Destruction of Old Town · Battle of the Museum of Military Glory · Siege of Halvo Bay Military Academy · Evacuation of Seahorse Hills · Battle of Elliott's Mansion · Raid on Onyx Point · Destruction of Downtown Halvo Bay · Ambush on the Halvo Bay Courthouse · Battle of the Plaza) · Battle of Kaia (Battle of Jasper · Battle of Autrin)
1 A.E. Battle of Bonbourg · Second Battle of Jannermont · Fall of Ostri · Battle of Andius · Ambush on Voslov Bridge · Hammer of Dawn Strikes · Fall of Claybourne · Siege of Zenic Laboratory · Assassination of Ukkon (Mission to CIC Aldair · Rescue of Echo-Five · Assault on Industrial District · Mission to Claybourne · Rescue of Alpha-Two · Mission to Nedroma Health Institute · Battle of Imtik Imulsion Rig · Mission to Winlock Outpost · Mission to the Badlands · Mission to Zenic Province · Battle of Ukkon's Laboratory) · Battle of Oblivion · Skirmish in the Live Zone
5 A.E. Fall of Landown
9 A.E. Battle of Noroa · Riverside Skirmish · Evacuation of Ilima (Ambush on Checkpoint Zeta · Assault on Ilima Savings and Trust · Mission to Ilima High School · Battle of Downtown Ilima · Battle of Dr. Wisen's Orphanage)
10 A.E. Battle of Estana · Skirmish at Shenko Falls · Fall of Ephyra
11 A.E. Skirmish Outside the Wire
12 A.E. Raid on Ginnet Drive · Incursions at Endeavor
13 A.E. Battle on the Andius Highway · West Barricade Campaign · Raid on the CIC
14 A.E. Operation: Midnight · Jilane Massacre · Siege of the Slab · Battle of the Slab · Lightmass Offensive (Battle of Embry Square · Mission to House of Sovereigns · Ambush at the Tomb of the Unknowns · Mission to Old Ephyra · Assault on Franklin's Outpost · Mission to Lethia Imulsion Facility · Mission to East Barricade Academy · Battle of Haldane Hall · Mission to Timgad · Battle on the Tyro Pillar) · Ambush at Sovereigns Boulevard · Evacuation of North Gate · Mission to Tollen · Battle of the Tollen Dam · Evacuation of Speyer · Evacuation of Fort Reval · Battle Outside of Jacinto · Mission to the Pirnah Badlands · Battle for Fucked · Mission to Montevado · Battle Near Jacinto · Unidentified M.O.U.T. Battle · Liberation of Jilane · Siege of Jacinto City (Raid on Pomeroy Depot · Raid on Jacinto Med) · Operation: Hollow Storm (Battle of Stromson Forest · Assault on Landown · Assault on the Inner Hollow · Battle of Ilima · Destruction of the Riftworm · Mission to New Hope Research Facility · Assault on Mount Kadar · Mission to Nexus · Siege of Nexus · Battle of the Royal Palace · Assault on Jacinto City · Sinking of Jacinto City) · First Mission to Merrenat Naval Base · Skirmish South of Port Farrall · Second Mission to Merrenat Naval Base · Battle of Port Farrall · Ambush Outside of Port Farrall
15 A.E. Skirmish in the Kashkur Foothills
17 A.E. Skirmish at Endeavor · First Battle of Azura · Victory Day (Battle of Centennial Bridge · Ambush on Hanover Coast · Battle of the Deadlands · Battle of the Anvegad Plains · Battle of Anvil Gate · Mission to Halvo Bay · Skirmish in Concord · Mission to Mercy · Mission to Char · Battle of Endeavor · Second Battle of Anvil Gate · Incursions in the Serano Ocean · Second Battle of Azura · Battle of Pinnacle Tower)
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