Federation Sabah (formerly British North Borneo) and Sarawak were separate British colonies from Malaya, and did not become part of the Federation of Malaya in 1957. Later on however, the then Federation merged with the self-governing State of Singapore and the British Colonies of North Borneo (now known as Sabah) and Sarawak under the Malaysia Agreement as the States of Malaya, the Borneo States of Sabah and Sarawak, and the State of Singapore of the new Federation called Malaysia on 16 September 1963, now known as Malaysia Day. Singapore left the Federation two years later in 1965 after being expelled by then the Prime Minister of Malaysia, Tunku Abdul Rahman. Previously, there were efforts to unite Brunei, Sabah, and Sarawak under the North Borneo Federation but that failed after the Brunei Revolt occurred.
Federation Sabah (formerly British North Borneo) and Sarawak were separate British colonies from Malaya, and did not become part of the Federation of Malaya in 1957. Later on however, the then Federation merged with the self-governing State of Singapore and the British Colonies of North Borneo (now known as Sabah) and Sarawak under the Malaysia Agreement as the States of Malaya, the Borneo States of Sabah and Sarawak, and the State of Singapore of the new Federation called Malaysia on 16 Septem.ber 1963, now known as Malaysia Day Singapore left the Federation two years later in 1965 after being expelled by then the Prime Minister of Malaysia, Tunku Abdul Rahman. Previously, there were efforts to unite Brunei, Sabah, and Sarawak under the North Borneo Federation but that failed after the Brunei Revolt occurred.