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
Toei 12-000 series Toei 12-000 series The is an electric multiple unit (EMU) train type operated by the Tokyo subway operator Tokyo Metropolitan Bureau of Transportation (Toei) on the Toei Oedo Line in Tokyo, Japan. A new batch of sets, classified 12-600 series, were delivered from fiscal 2011. Broadly based on the earlier 4th-batch design (sets 16 to 53), these sets included a number of design improvements. The 12-600 sets are formed as shown below, with all cars motored. The 12-600 series fleet details are as shown below. Two prototype cars, numbered 12-001 and 12-002, were delivered from Tokyu Car Corporation in April