This IHA provides an introduction to Roman forts and fortresses (permanent or semipermanent bases of Roman troops). These installations were a very important feature of the Roman period in Britain, as the British provinces were some of the most heavily militarised in the Roman Empire. Descriptions of the asset type and its development as well as its associations and a brief chronology are included. A list of in-depth sources on the topic is suggested for further reading. An introduction to Roman forts and fortresses (permanent or semi-permanent bases of Roman troops). These installations were a very important feature of the Roman period in Britain, as the British provinces were some of the most heavily militarised in the Roman Empire. Descriptions of the asset type and its development as well as its associations and a brief chronology are included.