1) Quislingism 
Collaborationism is cooperation with the enemy against one`s country in wartime. Stanley Hoffmann subdivided collaboration onto According to him, collaborationism can be subdivided onto the former is a deliberate service to an enemy, whereas the latter is a deliberate advocacy of co-operation with the foreign force which is seen as a champion of ....
collaborationism The act of cooperating traitorously with an enemy who is occupying one's country.
quislingism noun act of cooperating traitorously with an enemy that is occupying your country