A prisoner-of-war camp is a site for the containment of enemy combatants captured by a belligerent power in time of war. It is similar to an internment camp which is used for civilians. Purpose built prisoner-of-war camps appeared at Norman Cross in England in 1797 and HM Prison Dartmoor, both constructed during the Napoleonic Wars and they have been in use in all the main conflicts of the last 200 years.