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During 1914-1919 there were two large camps on the Isle of Man at Douglas and Knockaloe near Peel. The first was a requisitioned holiday camp whilst the second was purpose built using prefabricated huts and even had its own railway link. Large numbers of internees were held for up to five years until the camps finally closed in 1919.

In World War Two, camps were located in the Douglas area, Peel, Port Erin/Port St Mary and Ramsey. These held much smaller numbers of people thought dangerous to national security, sometimes only for a few months until the individuals were assessed for potential risk. There were also some political detainees including those held under section 18B of the Defence (General) Regulations. This enabled the Government to imprison those citizens thought to be dangerous to national security without charge, trial or set term.