The Ostri front was a theatre of the Pendulum Wars that saw trench-warfare between the Gears of the COG and the Indies of the UIR. The campaign was thirty years before the Siege of Anvil Gate. Cpt. Ranald Sander compared his quarters to the trenches of the Ostri front, with the smell of canvas, wool, charts and maps taking up every space on the walls.[1]



  1. 1.0 1.1 Gears of War: Anvil Gate pg 227
Pendulum Wars
47 B.E. Ostri Front
17 B.E. UIR occupation of Vasgar · Kashkur Front (Fall of Mendurat · Siege of Anvil Gate · Battle of Shavad · Battle of Ragani) · Raid on Gralia
4 B.E. Raids on the Acastu Imulsion Fields · Battle of Irohma Island
3 B.E. Sarfuth-Maranday Border Incident
2 B.E. Battle of Aspho Fields
0 B.E. Skirmish in Ghato City · Battle of Bonbourg · Skirmish on Furlin cliffside · Mutiny at OZP-11 · Armistice between the UIR and COG
Unknown timeline Battle of Branascu · Bombardment of Mercy · Conquest of the South Islands · Eastern Front · Bombing of Sikorla · Battle of Autrin · Battle of Berephus · Third Battle of the Plateau
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