The M808 Main Battle Tank, commonly known as the Scorpion, is the most common armored fighting vehicle employed by the Alliance of Nations, it is used in operations requiring heavy firepower or an anti-vehicular platform. Combining firepower, resilience and mobility, the Scorpion has proven itself formidable and earned the respect of friend and foe alike. The Scorpion may not be the most powerful or the fastest of the UNSC's fleet of main battle tanks, but for the most part, it represents the best possible balance between mobility and firepower. Indeed the vehicle's prominence among the Allied armed forces is due to its low production cost, transportability, and overall firepower.

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