 To counter this, the British attempted to unite the various states under its protection and, on 11 February 1959, six of the West Aden Protectorate states formed the Federation of Arab Emirates of the South to which nine other states were subsequently added.During the 1960s, the British sought to incorporate all of the Aden Protectorate territories into the Federation.On 18 January 1963, the Colony of Aden was incorporated against the wishes of much of the city's populace as the State of Aden and the Federation was renamed the Federation of South Arabia.