see your PMs.Do you have any links for that. I first heard about that from a post by the imfamous John G but I have never been able to find anything about it on google.
Pre-war there were apparently a lot of Sikhs in the Hong Kong Police Force and they too went over to the Japanese during the occupation. After the war they were dismissed by the British and no more were recruited as the Chinese Constables refused to work with them. There were locally recruited Sikhs in the RAF Police at RAF Seletar in the sixties. Very smart they looked too on the front gate as they checked passes. All over six foot, beards, turban, starched KD with white blancoed belt and anklets.