Aden Colony (, ), also the Colony of Aden, was a British Crown colony from 1937 to 1963 located in the south of contemporary Yemen. It consisted of the port of Aden and its immediate surroundings (an area of ). Prior to 1937, Aden had been governed as part of British India (originally as the Aden Settlement subordinate to the Bombay Presidency, and then as a Chief Commissioner's province). Under the Government of India Act 1935 the territory was detached from British India and established as a separate colony of the United Kingdom; this separation took effect on 1 April 1937. On 18 January 1963, the protectorate was reconstituted as the State of Aden (, ) within the new Federation of South Arabia. The federation in turn became the People's Republic of South Yemen on 30 November 1967, marking the end of British rule. The hinterland of Aden Colony was separately governed as the Aden Protectorate. History On 18 January 1839, the British East India Company landed Royal Marines at Aden. Their aims were to establish a supply port and stop attacks by Arab pirates against British shipping to India. The British Government thereafter considered Aden to be an important settlement due to its location, as the Royal Navy could easily access the port for resupply and repairs. Later, British influence extended progressively into the hinterland, both west and east, leading to the establishment of the Aden Protectorate. Aden soon became an important transit port and coaling station for trade between British India and the Far East, and Europe. The commercial and strategic importance of Aden increased considerably when the Suez Canal opened in 1869. From then and until the 1960s, the Port of Aden was to be one of the busiest ship-bunkering, duty-free shopping, and trading ports in the world. In 1937, Aden was separated from British India to become a Crown colony, a status that it retained until 1963. It consisted of the port city of Aden and its immediate surroundings (an area of ). The Aden Settlement, and later Aden Colony, also included the outlying islands of Kamaran (de facto), Perim and Kuria Muria (see map). Prior to 1937, Aden had been governed as part of British India (originally as the Aden Settlement under the Bombay Presidency, and then as a Chief Commissioner's province). Under the Government of India Act 1935 the territory was detached from British