The CDO FN's creation began in 1967 when two officers, Major (MAJ) Clarence Tan and MAJ James Chia, were tasked with recruiting eligible candidates from any unit in the SAF to form an elite unit. The SAF Regular Battalion was formed on 1 December 1969 and was directly under the command of Singapore's Ministry of Defence (MINDEF). Captain (CPT) Tham Chee Onn was selected to be the acting-Commanding Officer (CO) for the unit, which comprised 20 men, and was assisted by nine other officers. MAJ Clarence Tan subsequently joined the unit as its CO and was responsible for establishing its training program. A second recruitment drive was launched in early 1970 with the aim of increasing the number of officers in the unit. The unit was renamed "Singapore Armed Forces Commando Unit" in early 1971 and its red berets were introduced on 3 May 1971. On 16 July, the unit was renamed "1st Commando Battalion" (1 CDO BN) and moved from Pasir Laba Camp to Changi Camp. It had one company fully composed of regular soldiers.