In Metal Gear Solid: Peace Walker, what was the name of Big Boss’s private military company?

In Metal Gear Solid: Peace Walker, Big Boss’s private military company is called Militaires Sans Frontières.

Militaires Sans Frontières, commonly abbreviated as MSF, is the organization established by Big Boss and Kazuhira Miller before the events of Metal Gear Solid V. The French name translates as “Soldiers Without Borders,” reflecting the group’s identity as a force that operates independently of national governments.

MSF develops its own military infrastructure and operates from an offshore base in the Caribbean. Its members accept missions from different clients, making the organization an early example of the independent military companies that become central to the later Metal Gear timeline.

The group is destroyed during the events leading into Ground Zeroes. Afterward, Big Boss and his surviving allies establish Diamond Dogs, so the two organizations are related but not identical. FOXHOUND is associated with later special operations, while Outer Heaven is a separate name used in other stages of the series’ political history.