Zanzibar Land emerged from a war for independence against the Commonwealth of Independant States. Zanzibar emerged victorious, with help from mercenaries. This prompted the war to become known as the "Mercenary War".
Zanzibar Land soon began fortifying its military arsenal, raiding nuclear disposal sites across the world to obtain nuclear weapons that were still intact. The nation-state soon began a conquest of its neighboring countries at will, marking its growth into a world superpower.
Zanzibar Land at one point kidnapped a biologist, prompting Solid Snake to be sent in to rescue him. This mission would eventually lead to the apparent death of Big Boss and collapse of Zanzibar Land.