Clad in heavy Gravis armour, Aggressor Squads advance on the foe as walking fortresses of ceramite. More mobile than some other Space Marines, they're better able to negotiate rough ground, making them versatile troops; while they are often employed in specific circumstances or on certain terrain, Aggressor Squads are used as reserves to plug breaches in gun lines or to spearhead an advance. Images are property of Games Workshop Group PLC