In 1937, the Second Sino-Japanese War broke out. Lim Bo Seng and the other Chinese in Singapore joined in the Anti-Japanese activities, they did boycotting of Japanese goods and to support war in china. Near the end of 1937, hundreds of other countries Chinese people working in Japanese-owned industries in Malaya went on strikes. On December 1941, Lim Bo Seng was incharged of organising a group of volunteers to resist the Japanese who were going towards the Southeast Asia. The volunteers fight against the Japanese during battle of Singapore on February 1942. In February 1942, Lim Bo Seng left Singapore and went to Indonesia with Chinese community leaders and made his way to India later on. Lim Bo Seng recruited and trained hundreds of secret agents by the intensive military intelligence missions with both China and India. Lim Bo Seng and Captain John Davis the Special Operations Executive set up the Sino-British guerrilla task force Force 136 in the middle of 1942.
During 1944 March to April, Lim Bo Seng was Kempeitai under major at the roadblock in Gopeng. Lim Bo Seng was bedridden by the end of May 1944 due to his illness with dysentery. He died on early 29 June 1944 he was buried at the back of Batu Gajah prison compound in the unmarked spot. Lim Bo Seng's wife ,Gan Choo Neo was informed by a priest in St Andrew School. Gan Choo Neo traveled down to Batu Gajah to retrieve her husband ashes. A funeral is held on 13 January 1946 in City Hall.

Elizabeth was born in Hakka family in North Berneo.She was transferred to Jesselton and was promote to Distinct Officer and moved to Kalimantan. In August 1941, she married to a man called Choy Khun Heng working in a company called Berneo.
When Japanese invasion of Malaya, Elizabeth was a Second Lieutenant in the women's auxiliary arm of the Singapore Volunteer corps where she got her nickname "Gunner Choy". She was also a nurse with the Medical Auxiliary Service. Singapore fall in 1942, Elizabeth builded a canteen at Tan Tock Seng Hospital they did a risk by sending radio parts for hidden receivers until Japanese cracked down following Operation Jaywick. When Double Tenth Incident, an information told you the Kempeitai that elizabeth was involved in smuggling money in to Changi Prison and getting her husband caught. In September 1945, Japanese surrendered in Singapore. Lady Mountbatten invited Elizabeth to witness the official ceremony, where she was escorted by governor Sir Shenton Thomas and his wife and she had send medicine to Changi Prison