Southern Nigeria was a British protectorate in the coastal areas of modern-day Nigeria formed in 1900 from the union of the Niger Coast Protectorate with territories chartered by the Royal Niger Company below Lokoja on the Niger River.The Lagos colony was added in 1906, and the territory was officially renamed the Colony and Protectorate of Southern Nigeria. In 1914, Southern Nigeria was joined with Northern Nigeria Protectorate to form the single colony of Nigeria.