This open-access and peer-reviewed academic publication stems from the activities of the Offa-s Dyke Collaboratory, a research network founded in April 2017 to foster and support new research on the monuments and landscapes of the Anglo-Welsh borderlands and comparative studies of borderlands and frontiers from prehistory to the present. The proceedings of a series of academic and public-facing events have informed the character and direction of the Journal. Moreover, its establishment coincides with the Cadw/Historic England/Offa-s Dyke Association funded Offa-s Dyke Conservation Management Plan as well as other new community and research projects on linear earthworks. Published in print by Archaeopress in association with JAS Arqueolog- and supported by the University of Chester and the Offa-s Dyke Association, the journal aims to provide a resource for scholars, students and the wider public regarding the archaeology, heritage and history of the Welsh Marches and its linear monument