Militaires Sans Frontières

Militaires Sans Frontières, usually shortened to the MSF, was a private military led by Big Boss and Kazuhira Miller from 1972 to 1975. It is the business the player must manage throughout Metal Gear Solid: Peace Walker.

It is the predecessor of Diamond Dogs.

History
The MSF was formed in 1972 by Kazuhira Miller, who wanted to create a new business industry, a military-based one, and Big Boss, who wanted to create a nation-wide haven for soldiers among the planet. The military stood for no discrimination, no idealogies, and no borders, thus their names, Soldiers Without Borders. Taking base on an abandoned oil-rig known as Mother Base, the two mercenaries gathered up multiple volunteers, defected enemies, and prisoners of war and trained them into an army of elite soldiers. In 1975, the terrorist Skull Face and his strike-force XOF launched an attack on the MSF that permanently crippled it. Miller and Big Boss formed Diamond Dogs almost a decade later from the remnants of MSF to create an even stronger superpower, and were successful.