西インド連邦
Under Manley, Jamaica entered the West Indies Federation, a political union of colonial Caribbean islands that, if it had survived, would have united ten British colonial territories into a single, independent state. Jamaica's participation in the Federation was unpopular, and the results of the 1961 West Indies referendum held by Premier Manley cemented the colony's withdrawal from the union in 1962. The West Indies Federation collapsed later that year following the departure of Trinidad and Tobago.