--subdivisions Secret service and Underground movements under individual wars, e.g. World War, 1939-1945--Secret service; World War, 1939-1945--Underground movements
--subdivision Collaborationists under individual wars, military occupations and history of a country under foreign rule, e.g. World War, 1939-1945--Collaborationists; Korea--History--Japanese occupation, 1910-1945--Collaborationists