This article is considered accurate for the current version (1.56) of the game.
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Armed with a rack of Bonesaw mortar launchers, the Thornfall is designed to launch an indirect mechanized assault on enemy armour. This unique vehicle supports an allied assault and cannot withstand large amounts of punishment.
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— In-game description
The Gallagher Thornfall Mk. VI (also known as a Bonelaw) is a late-game WardenCruiser Tank that can boost and is defined by its rear-mounted launchers. It is equipped with eight ARC⧸RPG Bonesaw Mortars and a forward facing 7.92mm machine gun.
The Gallagher Thornfall Mk. VI has 2650 HP and is disabled under 30% health. It has "Heavy Armor" resistance: it can soak small arms fire, shrapnel, and 12.7mm machine guns, and it is immune to Flamethrowers. But heavy explosives and anti-tank weaponry are a real threat to it. It has subsystems that have a chance to be disabled by heavy explosives and anti-tank weaponry if hit specifically: Tracks: 20% (Anti-Tank Mines always disable them), Fuel Tank: 30%, Turret/Cannon: 35%. It has Tank Armor. With it, in best case scenario, penetrating projectiles only have a 33% chance of penetrating and doing damage. That chance goes up quickly if the armor is worn or if it is shot from up close, or on the side or rear from a direct angle, or with ammo that has penetration bonuses. It takes 150 Basic Materials to fully repair it from 1% to 100% health with a Hammer. Its health, subsystems, and Tank Armor can be instantly repaired at a Garage for 100 Basic Materials.
The Gallagher Thornfall Mk. VI, just like all Cruiser Tanks, are designed to flank enemy tanks, not charge frontally. Its low fuel consumption without boosting allows it to roam to find armored targets. It can either defend itself against infantry with its 7.92mm machine gun or run away using its boost function. When it finds a target, you use the tank's boost and maneuverability to flank it and get as close as possible. You can then fire the full 8 shell salvo from its short range bonesaws to deal massive damage in a short time and potentially disable their turret. Once you've spent all your ammo, or if the enemy tank is dead, use your boost to run to safety and to reload your bonesaws.
Keep in mind that the tank is not as durable (in terms of health and armor) as other Warden tanks, so if it is spotted, and is in a vulnerable position, it can be quickly disabled or destroyed in the engagement.
Standard Equipment Loadout
Like with every other armored vehicle, the crew should ALWAYS equip themselves with a Gas Mask and multiple Filters to avoid dying to Gas Grenades. Additionally, they should bring a Hammer and Basic Materials to repair the tank. These tactics can be buffed by wearing either a Tank Uniform or an Engineer Uniform.
