History of West Africa more states. Early human settlers arrived in West Africa around 12,000 BCE. In the fifth millennium, as the ancestors of modern West Africans began entering the area, the development of sedentary farming began to take place in West Africa. The Iron industry, in both smelting and forging for tools and weapons, appeared in Sub-Saharan Africa by 1200 BCE, and by 400 BCE, contact had been made with the Mediterranean civilizations, and a regular trade included exporting gold, cotton, metal, and leather in exchange for copper, horses, salt, textiles, and beads. Culture developed further with the Nok culture (1000 BCE to
Vehicle registration plates of Nigeria Vehicle registration plates of Nigeria Nigerian vehicle registration plates in current used were introduced in 1992 and revised in 2011. Nigeria and Liberia are the only two African countries that use the North American standard 6 × 12 inches (152 × 300 mm). The international code for Nigeria is "WAN" (West Africa Nigeria). The license plates are generally white and the number itself is imprinted in blue. In the upper left-hand corner they carry the Flag of Nigeria or the national coat of arms. The state name and slogan is displayed at the top centre of the plate, and the