Force 136 was the general cover name for a branch of the British World War II organization, the Special Operations Executive (SOE). The organisation was established to encourage and supply resistance movements in enemy-occupied territory, and occasionally mount clandestine sabotage operations. Force 136 operated in the regions of the South-East Asian Theatre of World War II which were occupied by Japan from 1941 to 1945.
Although the top command of Force 136 were British officers and civilians, most of those it trained and employed as agents were indigenous to the regions in which they operated. British, Americans or other Europeans could not operate clandestinely in cities or populated areas in Asia, but once the resistance movements engaged in open rebellion, Allied armed forces personnel who knew the local languages and peoples became invaluable for liaison with conventional forces. In Burma in particular, SOE could draw on many former forestry managers and so on, who had become fluent in Burmese or other local languages before the war, and who had been commissioned into the Army when the Japanese invaded Burma.
SOE was formed in 1940, by the merger of existing Departments of the War Office and the Ministry of Economic Warfare. Its purpose was to incite, organise and supply indigenous resistance forces in enemy-occupied territory. Initially, the enemy was Nazi Germany and Italy, but from late 1940, it became clear that conflict with Japan was also inevitable.
Two missions were sent to set up (and assume political control of) the SOE in the Far East. The first was led by a former businessman, Valentine Killery of Imperial Chemical Industries (ICI), who set up his HQ in Singapore. A scratch resistance organisation was set up in Malaya, but Singapore was captured on 15 February 1942, soon after Japan entered the war.
A second mission was set up in India by another former businessman, Colin Mackenzie of J. and P. Coats, a clothing manufacturer. Mackenzie's India Mission originally operated from Meerut in North West India. Its location was governed by the fear that the Germans might overrun the Middle East and Caucasus, in which case resistance movements would be established in Afghanistan, Persia and Iraq. When this threat was removed late in 1942 after the battles of Stalingrad and El Alamein, the focus was switched to South East Asia.