The History of the Kingdom of Dahomey spans 400 years from around 1600 until 1904 with the rise of the Kingdom of Dahomey as a major power on the Atlantic coast of modern-day Benin until French conquest. The kingdom became a major regional power in the 1720s when it conquered the coastal kingdoms of Allada and Whydah. With control over these key coastal cities, Dahomey became a major center in the Atlantic Slave Trade until 1852 when the British imposed a naval blockade to stop the trade. War with the French began in 1892 and the French took over the Kingdom of Dahomey in 1894. The throne was vacated by the French in 1900, but the royal families and key administrative positions of the administration continued to have a large impact in the politics of the French administration and the post-