Kowloon Walled City was an ungoverned, densely populated de jure Chinese enclave within the boundaries of Kowloon City, Hong Kong. Originally a Chinese military fort, the walled city became an enclave after the New Territories were leased to the United Kingdom by China in 1898. Its population increased dramatically following the Japanese occupation of Hong Kong during World War II. By 1990, the walled city contained 50,000 residents within its 2.6-hectare (6.4-acre) borders. From the 1950s to the 1970s, it was controlled by local triads and had high rates of prostitution, gambling, and drug abuse.
