The sinking of Tollen and Montevado was a major offensive from the Locust Horde in the aftermath of the Lightmass Offensive. Showing the COG, the last remnant of the human race, that the Horde survived the Lightmass Bomb and able to sink whole cities noting seen since E-Day.


In the aftermath of the Lightmass Offensive, and the death of General RAAM, the Locust deity Rift Worm was awakened, which Skorge, the Kantus high priest, used to attack the last human stronghold.[4][5] The Locust Horde planned to destroy key cities that surrounded Jacinto City, attempting to destroy the last of the COG forces and drown the Lambent Locust with sea water.[6]


The Locust counterattack began with sinking of COG outposts and military installations[7]. These events went under the radar since Serans were used to the E-Holes. But nothing prepared the COG or the human race for what was happening under Tollen and Montevado.

The SinkingEdit

Despite their greatly diminished ground forces, the Locust still attempted daring raids into COG control zones and ambushed Gear squads in patrols[8][9]. The sinking of Tollen and Montevado was a major event in the Locust War. It showed that the Lightmass Bomb failed to kill all the Locust forces.

Mission to MontevadoEdit

Main article: Mission to Montevado

Delta-One KR is shot down

After the Mission to the Pirnah Badlands Delta squad was sent to investigate seismic activity. In route to the city a Seeder shot them down.[10] Delta-1 was able to reach Montevado but were attack by a Brumak. Cole was able to blast the Brumak's right arm with a Boom Shot and Baird trapped it under giant rocks with a help of the Centaur Tank. Delta ordered Sigma Squad back to Jacinto and to take Lily with them[11]. Delta enter the city while the sun was going down. They found only one Stranded telling them the city is a death trap and only two other stranded and small settlement quarter of mile away was left. But a pack of Wretches attack them killing the Stranded. But after defeating the wrenches the city began to sink[12].

Mission to TollenEdit

Main article: Mission to Tollen
"The whole damn place is filling up with water. Help us, you bastards"
— Last message from Tollen.

In the aftermath of the evacuation of North Gate. Coalition High Command sent Delta Squad to investigate the flooding of the city. The city was located approximately two hours from Jacinto. Delta Squad, along with Sgt. Mataki, were dispatched via King Raven helicopter to recon the area, but not to rescue Stranded. Upon their arrival, Delta Squad realized that water had not flooded the city; instead, the city had sunk and turned into a massive lake, ten kilometers across. The lake was perfectly round, and appeared almost artificial. The Raven pilot thought it was caused by methane gas, and quickly flew away for fear of his vehicle going down. Baird, and perhaps Marcus, thought differently. Baird thought it was the Locust, although he didn't know how they had accomplished such a feat. It would later be discovered that the actions of the Rift Worm were responsible.[13]


After realizing that both the Tollen and Montevado sinkings were not natural and was done by the Locust, the COG High command decided a counterattack into the Inner Hollow would be the only way to end the war once and for all. Before the Rift Worm was killed by Delta-One, however, it sank the city of Ilima.


  1. Gears of War:Aspho Fields pg.378
  2. Beneath the Surface: An Inside Look at Gears of War 2
  3. Gears of War:Hollows Issue 3
  4. Gears of War 1
  5. Gears of War 2 collectibles
  6. Gears of War 2 act 4,5
  7. Beneath the Surface: An Inside Look at Gears of War 2
  8. Gears of War:Aspho Fields
  9. Gears of War:Hollow
  10. Gears of War:Hollow issue 3
  11. Gears of War:Hollows Issue 4
  12. Gears of War:Hollows Issue 4
  13. Gears of War:Aspho Fields pp381-385
Locust War
0 A.E. Emergence Day (First Battle of Jannermont · Battle of Porta Ogari · Battle of Mattino Junction · Battle of Nordesca · Evacuation of Mercy · Battle of Ephyra (E-Day) · Fall of Gorasnaya ) · Battle of Kinnerlake · Destruction of Halvo Bay · Battle of Autrin · Battle of Jasper · Battle of Kaia
1 A.E. Battle of Bonbourg · Second battle of Jannermont · Fall of Ostri · Battle of Andius · Ambush on Voslov Bridge · Hammer of Dawn strikes · 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
10 A.E. Battle of Estana · Skirmish at Shenko Falls · Battle 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 · Siege of the Slab · Battle of the Slab · Lightmass Offensive · Assault on Franklin's Outpost · Battle of Tollen Dam · Evacuation of Fort Reval · Evacuation of Speyer · Jilane Massacre · Ambush at Sovereigns Boulevard · Evacuation of North Gate · Sinking of Tollen and Montevado · Mission to Tollen · 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 (Raid on Pomeroy Depot · Raid on Jacinto Med) · Operation: Hollow Storm (Assault on Landown · Battle of Ilima · Mission to New Hope Research Facility · Siege of Nexus) · First Mission to Merrenat Naval Base · Skirmish south of Port Farrall · Second Mission to Merrenat Naval Base
15 A.E. Battle of Port Farrall · Ambush outside of Port Farrall · Lambent Pandemic
16 A.E. Skirmish in the Kashkur Foothills
17 A.E. First Battle of Azura · Mission to Hanover · Battle of Centennial Bridge · Battle of the Deadlands · Battle of Anvil Gate · Mission to Mercy · Attack on Griffin Tower · Battle of Endeavor Naval Shipyard · Mission to Halvo Bay · Second Battle of Azura