 With the collapse of the defences in Kota Bahru, the Battalion was withdrawn to Singapore and was joined with the Brigade on 18 December 1941.All organised Allied forces in Malaya had retreated to Singapore on 31 January 1942.The Brigade was deployed as part of the defence of the Southern Area of Singapore under the command of Maj Gen Frank Keith Simmons together with the 2nd Malaya Infantry Brigade, the Straits Settlements Volunteer Force Brigade and the 12th Indian Infantry Brigade.