Colony of Aden on 1 April 1937. On 18 January 1963, the colony was reconstituted as the State of Aden ( "Wilāyat ʿAdan") 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 the Colony of Aden was separately governed as the Aden Protectorate. On 19 January 1839, the British East India Company landed Royal Marines at Aden to occupy the territory and stop attacks by pirates against British shipping to India. The British Army considered Aden an important place due to
Agencies of British India Agencies of British India An agency of British India was an internally autonomous or semi-autonomous unit of British India whose external affairs were governed by an agent designated by the Viceroy of India. They varied in character from fully autonomous self-governing dependencies such as princely states, where the agent functioned mainly as a representative of the Viceroy, to tribal tracts which were integral parts of the British Empire and where the agent was completely in charge of law and order. The agent of a protected tract or princely state usually resided outside the territory in his charge, as opposed to