After leaving the Patriots in 1972, Naked Snake, a.k.a. Big Boss, formed the "Militaires Sans Frontières," so as to provide military force for anyone who needs them, regardless of nations or ideologies. As such, the MSF also specialized in providing the full range of military services, including combat, logistics, training, weapons, outfitting, and R&D. In addition, the MSF was also designed to merge the small footprint and exceptional performance of Special Forces groups and the full military might of a full regular army, as a means to fully break free of nation-states. Employed by the Colombian government sometime after 1972, Snake and the MSF fought an opposing mercenary unit led by Kazuhira Miller as their last contracted job for the Colombian government. After MSF defeated the enemy force, Snake offered Miller a place in the group, which he eventually accepted, later becoming its second-in-command. During this time, Miller also viewed MSF as being a "new kind of business" regarding guns-for-hire, that is neither tied to mercenaries nor to a foreign legion, and also intended to help Big Boss succeed in his goals for MSF. In addition, between its founding and its employment under the Colombian government, it often relocated in order to avoid the CIA.
