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A core responsibility of any Government is the security of its sovereign territory and population. In the United Kingdom (UK), there is a distinction between the defence of the UK against military threats and UK civil protection as established in statute by the Civil Contingencies Act 2004 and enabled through the cross-Government Department and Inter-Agency Integrated Emergency Management (IEM) approach.
All military operations undertaken within the UK fall under the generic title of United Kingdom Operations (UK Ops). This designation includes the Defence contribution to resilience, which is provided at the specific request of the civil authorities, is subject to civil primacy and requires the authorisation of Defence Ministers.
This publication addresses those UK Ops that rely on close civil/military cooperation. UK Ops activity includes: Military Aid to the Civil Authorities (MACA), Military Operations (MO) in support of the standing strategic and overseas tasks and Military Home Defence (MHD) of UK territory against an external military threat. Although MHD is a dormant UK operation, details have been included to reflect its close association with both MACA and the Standing Home Commitment(SHC) military tasks.