<P> Lagos Colony was a British colonial possession centred on the port of Lagos in what is now southern Nigeria . Lagos was annexed on 6 August 1861 under the threat of force by Commander Beddingfield of HMS Prometheus who was accompanied by the Acting British Consul , William McCoskry . Oba Dosunmu of Lagos ( spelled `` Docemo '' in British documents ) resisted the cession for 11 days while facing the threat of violence on Lagos and its people , but capitulated and signed the Lagos Treaty of Cession . Lagos was declared a colony on 5 March 1862 . By 1872 Lagos was a cosmopolitan trading center with a population over 60,000 . In the aftermath of prolonged wars between the mainland Yoruba states , the colony established a protectorate over most of Yorubaland between 1890 and 1897 . The colony and protectorate were incorporated into Southern Nigeria in February 1906 , and Lagos became the capital of the protectorate of Nigeria in January 1914 . Since then , Lagos has grown to become the largest city in West Africa , with an estimated metropolitan population of over 9,000,000 as of 2011 . </P>
<P> Lagos Colony was a British colonial possession centred on the port of Lagos in what is now southern Nigeria . Lagos was annexed on 6 August 1861 under the threat of force by Commander Beddingfield of HMS Prometheus who was accompanied by the Acting British Consul , William McCoskry . Oba Dosunmu of Lagos ( spelled `` Docemo '' in British documents ) resisted the cession for 11 days while facing the threat of violence on Lagos and its people , but capitulated and signed the Lagos Treaty of Cession . Lagos was declared a colony on 5 March 1862 . By 1872 Lagos was a cosmopolitan trading center with a population over 60,000 . In the aftermath of prolonged wars between the mainland Yoruba states , the colony established a protectorate over most of Yorubaland between 1890 and 1897 . The colony and protectorate were incorporated into Southern Nigeria in February 1906 , and Lagos became the capital of the protectorate of Nigeria in January 1914 . Since then , Lagos has grown to become the largest city in West Africa , with an estimated metropolitan population of over 9,000,000 as of 2011 . </P>
when did lagos become a colony of britain
when did lagos become a colony of britain
5 March 1862
5 March 1862