The Lei Yue Mun Redoubt is the central military structure of the Lei Yue Mun Fort built by the British forces in 1887. There are eighteen casemates, originally used as barrack rooms, magazines, shell and cartridge stores, preparation rooms and for other purposes. The casemates are connected by passageways. The central part of the Redoubt is an open courtyard where the soldiers assembled. We renovated and added modern museum facilities to the Redoubt in which artefacts related to the history of Hong Kong's coastal defence covering the Ming and Qing period, the British period, the Japanese invasion and the period after the resumption of Chinese sovereignty over Hong Kong are displayed. In addition to textual and graphical illustrations, the exhibition also features some 400 military artefacts, supplemented by multi-media programmes. It is hoped that visitors can gain a better understanding of the history of coastal defence in Hong Kong.