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Outer Heaven, also known as Militaires Sans Frontières (French for Soldiers Without Borders; lit. Military Without Frontiers), abbreviated as MSF, is a private military company founded in the 1970s and led by Big Boss - who remains unknown to most of the public. Because of their mercenary status, their questionable tactics on the battlefield, and their usage of an off-shore forward operating base in the middle of the Caribbean Sea during the mid 1970s, they were frequently referred to by their enemies as pirates.