This work is a catalogue of the Roman military equipment held in the National Museum of Wales, Cardiff. Included are an historical survey of the collections of the Museum relevant to this study; a brief account of the Roman Army in Wales; and an explanation of the structure of the catalogue. The catalogue is followed by a gazetteer which gives an outline description of the sites from which the material comes and a listing of the objects by site, with cross-reference to the catalogue proper. There is also a discussion which gives a brief overview of the collection as a whole.