Shanghai Municipal Police
Upon return to the UK and US, veterans of the Shanghai Municipal Police were tasked in training allied World War II commandos and intelligence personnel, including the British Commandos - SAS &amp; SBS, the US/Canadian 1st Special Service Force ("Devil's Brigade"), the Office of Strategic Services (precursor to the CIA), the British Special Operation Executive, Marine Raider Units, and the US Army Rangers. Upon engagement with enemy personnel skilled in classical European arts and old school judo, the post-battlefield reports of the “Shanghai method” produced the highest number of documented kills of any combatives system to date.