Gangjiu Da Dui / HK-Kowloon brigade / 港九大隊 [1942-1943]

Notes from Wikipedia:

In January 1942 the HK-Kowloon brigade (港九大隊) was established from the Guangdong People's anti-Japanese Guerilla force.[38] In February 1942 with local residents Cai Guo-liang (蔡國梁) as commander and Chen Da-ming (陳達明) as political commissar, they were armed with 30 machine guns and several hundred rifles left by defeated British forces.[9] They numbered about 400 between 1942 and 1945 and operated in Sai Kung.[9] Additionally, the guerillas were noteworthy in rescuing prisoners-of-war, notably Sir Lindsay Ride, Sir Douglas Clague, Professor Gordan King, and David Bosanquet.[2] In December 1943 the Guangdong force reformed the East river guerillas, absorbing the HK-Kowloon brigade into the larger unit.[38]