sentences:  It was created on 25 December 1941 by Lieutenant Colonel John Dalley of the Federated Malay States Police Force.The unit was known to the British colonial administration as Dalforce, after its chief instructor and commanding officer, John Dalley, whereas the Chinese in Singapore only knew it as the Singapore Overseas Chinese Anti-Japanese Volunteer Army.This formation took part in the Battle of Singapore and some members conducted a guerrilla campaign against Japanese forces during the Japanese occupation.