%0 Journal Article %T Defence Engagement (Health) between the UK and Ireland since the Good Friday Agreement in 1998. %A Moore AJL %A McCrory B %A Corcoran A %A Guckian N %A Bergin S %A McCloskey C %A Bricknell M %A Kelly J %J BMJ Mil Health %V 0 %N 0 %D 2024 May 23 %M 38782492 %F 2.8 %R 10.1136/military-2023-002657 %X This paper describes the range of Defence Engagement (Health) (DE(H)) activities between Northern Ireland and Ireland following the Good Friday Agreement in April 1998. Although the Agreement made provision for cross-border cooperation in health, the Omagh bombing of August 1998 energised the discussion to provide greater co-ordination of future responses to mass casualty events. The paper describes these DE(H) activities at the Strategic, Operational and Tactical levels to show the integration across these levels and between the agencies of both governments. The paper shows how a DE(H) programme can have a successful strategic effect by finding topics of mutual interest that can bring together two countries in order to provide an effective health and social care provision. This paper forms part of a special issue of BMJ Military Health dedicated to Defence Engagement (.