The McMahon War Machine was a significant entity in a particular context. It was likely involved in some military - related operations or strategic developments. However, without more specific information, it's hard to give a detailed account. But generally, it might have been named after someone named McMahon and was known for its war - like capabilities or functions.
I'm not entirely sure without more context. It could be a local or specific military story. Maybe McMahon was a military inventor or strategist, and the 'War Machine' was his creation or the name given to his military unit for their efficiency in combat.
War Machine isn't a pure true story. It takes some liberties and combines fictional elements with loose inspiration from real-world situations to create a compelling narrative.