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The Leonic Commonwealth

Chieftain Mk.12

Main Battle Tank
Now equipped with way more armour

General information

Locomotion
Tracked
Supported classes
Crewman
Obtainment
Free

In-game availability

Loadout/TeamEagle Federation
Cold WarTier 5
Data as of 12/25/2025

Vehicle

Weight57.2 t
Seating capacity4
Commander1
Driver1
Gunner1
Loader1
Max speed
Forward48 km/h
Backward11.1 km/h

Powertrain

EngineLeyland L60 V2
TypeDiesel
Max RPM2,550 RPM
Horsepower840 hp
Power-to-weight ratio14.7 hp/t
Transmission
Forward gears6
Reverse gears2
Neutral steeringYes

Gunner turret

Feature: Stabilizer
Feature: Smoke grenades
Traversal
Horizontal speed22.5 deg/s
Vertical speed22.5 deg/s
Vertical limits-10°–20°

Weapons

120mm L11A5

Reload speed7.5s
Refill speed6s
AmmoMax
Shell L31A724
Shot L23A116
Shell L34A26
Ammo models
Ready rack19
Turret ammo15
Hull ammo12

7.62mm L8A1

Reload speed6s
Magazine size200
AmmoMax
AP*
Ammo models
Coax ammo30

Sights

Main sight

Feature: FCS
Feature: Lead
RangefinderLaser
Vertical limits-15°–28°
Zoom10x

Thermal sight

Feature: FCS
Feature: Lead
RangefinderLaser
ThermalsWhite (Gen 2) (forced)
Vertical limits-15°–28°
Thermal zoom10.2°, 3.9°

Backup sight

Feature: FCS
RangefinderNone
Vertical limits-10°–20°
Zoom7x

Commander turret

Feature: Stabilizer
Traversal
Mouse aimYes
Horizontal speed60 deg/s
Vertical speed60 deg/s
Vertical limits-10°–30°

Weapons

7.62mm L37A1

Reload speed6s
Magazine size100
AmmoMax
AP*
Ammo models
Commander ammo20

Sights

Sight 1

RangefinderNone
Zoom1x–10x
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