2026-09-27T15:31:38+01:00https://marinefinds.org.uk/datalabs/terminology/object/format/jsonhttps://marinefinds.org.uk/datalabs/terminology/object/format/xmlhttps://marinefinds.org.uk/datalabs/terminology/object436868882FRONTIER DEFENCEYA system of fortifications constructed along a national frontier to contain the local population, as well as keep out undesirable raiders eg. Offa's Dyke. Use with more specific monument type where known.1P