Lim Bo Seng's Force 136

Lim Bo Seng's name is inextricably linked with that of Force 136, for he had a hand in setting it up and bringing it to success. The British regrouped after their disastrous capitulation and plans were afoot to regain their lost territories. However, they lacked intelligence on the Japanese troops in Malaya and this could only be remedied if they had a good intelligence network on the ground. For this purpose, Lim Bo Seng was persuaded by the British to help set up a clandestine spy network in Malaya. With Bo Seng's help, the British joined forces with Nationalist China to recruit and train the Force 136 members, which consisted mainly of overseas Malayan Chinese. From China, these men were sent to the Far East Military School in Poona, India where they were taught shooting and survival skills, jungle and guerrilla warfare and intelligence gathering techniques.

Upon graduation, they were sent to Malaya in batches, at first by submarine. The first team, Gustavus I, departed for Malaya on 11th May 1943 and landed in Tanjong Hantu on the 24th. The first base was set up at Bukit Segari. Subsequent batches were landed along the west coast of Malaya. Later on in the war, Force 136 members were parachuted into various Malayan states. As the war dragged on and it became apparent that Japan was losing the war, more and more British officers and Force 136 members were parachuted in, along with weapons and supplies. However, before Operation Zipper (the planned British invasion of Malaya) was launched, the Japanese surrendered unconditionally. Shortly after the surrender, Force 136 was disbanded, but not before its members had been feted as liberation heroes who had put their lives on the line for freedom.
(Source: http://wiki.answers.com/Q/What_contributions_did_Lim_Bo_Seng_make_to_Singapore)