Militaires Sans Frontières (\mi.li.tɛʁ sɑ̃ fʁɔ̃.tjɛʁ\ approx: mee-lee-TEHR sahn frohn-ti-AIR), abbreviated MSF and known in English as Army Without Borders, was a private military company founded and led by renowned mercenaryBig Boss in the early 1970s. Abandoning their home countries, the "soldiers without borders" provided their services to all clients, regardless of nation or ideology, operating from their offshore Mother Base in the Caribbean Sea, of which the group itself is called by that name.