The M861 Main Battle Tank, otherwise known as "Titan", is a heavily armored UNSC tank developed sometime after the Human-Covenant war. It was used in operations requiring both speed and heavy firepower. The Titan excelled far greater than its predecessors: the M808B Main Battle Tank and the M850 Main Battle Tank, capable of reaching a maximum speed of 60 miles per hour and having firepower on par with the M850 Main Battle Tank (it is equipped with a single modified M310 120mm Smooth-Bore High-Velocity Cannon). Despite being an advance tank that was intended to replace the M808B Main Battle Tank, the Titan served alongside with the Scorpion in numerous operations.