The Mission to Tollen was one of the first major battles following the Lightmass Offensive and the first indication that the Locust Horde survived. Initially, the Gears and civilians in Tollen were attacked by the emerging Locust Drones. During the battle, the city was sunk completely underground. The sinkhole was filled with natural water, creating an artificial lake within the city's sinkhole. This was the work of Ketor Skorge, commanding the gargantuan Riftworm to burrow underground and sink Tollen, weakening the Jacinto Plateau's granite base in order to sink Jacinto City, causing it to flood the Inner Hollow and destroy the Lambent.
Order of Battle
Sinking of Tollen
In the aftermath of the Evacuation of North Gate, seismic activity was detected at Tollen and within 18 seconds, contact with the city was lost. COG High Command decided to send Delta-One on a recon mission to see if the Locust were back. They discovered a massive sinkhole full of water. No survivors were found.
- Last Day (First appearance)
- Aspho Fields
- Gears of War 2 (Mentioned only)
- Gears of War 4 (Mentioned only)
- Gears 5 (Mentioned only)