Industry WIKI

After the defeat of France in 1940, a large black market developed in both German-occupied territory and the zone libre controlled by the Vichy regime. Diversions from official channels and clandestine supply chains fed the black market. It came to be seen as "an essential means for survival, as popular resistance to state tyranny invading daily life, as a system for German exploitation,

A currency union (also known as monetary union) is an intergovernmental agreement that involves two or more states sharing the same currency. These states may not necessarily have any further integration (such as an economic and monetary union, which would additionally have a customs union and a single market).