There were 40 known prisoner-of-war camps across Canada during World War II. The camps were identified by letters at first, then by numbers. The prisoners were given various tasks; many worked in the forests as logging crews. In addition to the main camps there were branch camps and labour camps.
The largest number of prisoners of war was recorded as 33,798. (One source claims that at its peak, Canada interned 35,046 prisoners of war and Japanese-Canadians.) There were an additional 6,437 civil internees, members of the merchant marine and refugees.
There are claims that conditions in the Canadian camps tended to be better than average, and many times better than the conditions of the barracks that Canadian troops were kept in. It is believed by some that this treatment foiled many escape attempts before they even started. Notably, it is told that a group of German prisoners returned to Ozada camp after escaping because of encountering a grizzly bear.