Wartime collaboration is cooperation with the enemy against one's country of citizenship in wartime. As historian Gerhard Hirschfeld says, it "is as old as war and the occupation of foreign territory". The term collaborator dates to the 19th century and was used in France during the Napoleonic Wars. The meaning shifted during World War II to designate traitorous collaboration with the enemy. The related term collaborationism is used by historians who restrict these terms to refer to a subset of wartime collaborators in Vichy France who actively promoted German victory. The term collaborate dates from 1871, and is a back-formation from collaborator (1802), from the French collaborateur. It was used during the Napoleonic Wars against smugglers trading with England and assisting in the escape of monarchists. It is derived from the Latin collaboratus, past participle of collaborare "work with", from com- "with" + labore "to work". The meaning of "traitorous cooperation with the enemy" dates from 1940, originally in reference to the Vichy Government of France, which cooperated with the Germans after the fall of France and during their occupation, 1940–44. It was first used in the modern sense on 24 October 1940 in a meeting between Marshal Philippe Pétain and Adolf Hitler in Montoire-sur-Loire a few months after the Fall of France. Pétain believed that Germany had won the war, and informed the French people that he accepted "collaboration" with Germany.. Vichy France#Collaborationistes Collaboration in wartime can take many forms, including political, economic, social, cultural, or military collaboration. The activities undertaken can be treasonous, to varying extent, and in a World War II context generally working with the enemy actively. Stanley Hoffmann subdivided collaboration into involuntary (reluctant recognition of necessity) and voluntary (an attempt to exploit necessity). According to him, collaboration can be either servile or ideological.