AOG
You should tell the British Army. They areunder the belief that Peacekeeping is one of their primary functions. They even boast they are good at it.
// The British Army is actively engaged in operational duties across the globe. The work we do ranges from peacekeeping to providing humanitarian aid, from enforcing anti-terrorism measures to helping combat the international drugs trade. //
http://www.army.mod.uk/operations-deployments/operations-deployments.aspx
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// The UK is a contributor to UN peacekeeping operations around the world. As of February 2012, the UK was contributing a total of 283 personnel to the following missions :
United Nations Organization Stabilization Mission in the DR Congo (MONUSCO),
UN Peacekeeping Force in Cyprus (UNFICYP) and
UN Mission in the Sudan (UNMISS).
Source: UN Peacekeeping, Monthly Summary of Contributors of Military and Civilian Personnel
Support to European Union peace operations
European Union Police Mission (EUPM) in Bosnia and Herzegovina: As of 18 September 2009, the UK was contributing eight personnel to EUPM. The goal of the mission is to support the police reform process and to continue to develop and consolidate local capacity and regional cooperation in the fight against organised crime. //
http://www.geneva-academy.ch/RULAC/peace_operations.php?id_state=183