Ministry of Defence (Kilmark–Killarney)

The Ministry of Defence of the Common Realm (Killarne: Rounnsæcht Ambusieidhú Riæmcha Cubmunanndælí; Killian: Runnsaich Aumnusaiddé Raimsai Chnanndailai), usually just called the Ministry of Defence (Rounnsæchtambu; Runnsaicaumnu), is one of the five ministries of Kilmark–Killarney's Cabinet of the Common Realm, the executive government responsible for matters affecting the dual monarchy as a whole.

The Ministry of Defence is the largest ministry in Kilmark–Killarney by number of employees, budget size and economic impact. It is responsible for oversight of the Royal Realm Defence, the unified armed forces of Kilmark–Killarney. The incumbent Minister of Defence is Rúman Caimsæg, in office since 2011. The Ministry of Defence has its headquarters in the Royal Borough of Sieanninas, Milo.