Traders initially sent people to Europe to work as servants until the market for labour expanded in the West Indies and North America in the 18th century. In 1807, the United Kingdom abolished the slave trade throughout its empire. It also tried, unsuccessfully, to end the slave trade in the Gambia. Slave ships intercepted by the Royal Navy's West Africa Squadron in the Atlantic were also returned to the Gambia, with people who had been slaves released on MacCarthy Island far up the Gambia River where they were expected to establish new lives. The British established the military post of Bathurst (now Banjul) in 1816.