Editing Nord-Pas-de-Calais (section)

=== Between the wars ===
After the war, the industrial region of Nord-Pas-de-Calais was devastated, and in 1919 was classified as a [[Zone rouge|red]] or yellow zone for around two-thirds of its surface area.

The reconstruction movement made massive use of immigration, particularly from [[Poland]], to compensate for the decline in population due to the war, and to adapt to the new legislation limiting the working day to eight hours. But the economic crisis of the 1930s soon prevented any real economic or cultural renaissance. It also led to downsizing, with recent immigrants the first to be affected.<ref>{{Harvtxt|Collectif|1988|p=311}}</ref>

The region saw a breakthrough of the extreme right, including the "green shirts" among the peasants,<ref name=":4">{{Harvtxt|Collectif|1988|p=312}}</ref> which prompted Le-Nord-Pas-de-Calais to unite. When the [[Popular Front (France)|Front Populaire]] came to power in France in 1936, three deputies from the Nord were in government, including [[Roger Salengro]].<ref>{{Harvtxt|Collectif|1988|p=314}}</ref> Factories went on strike en masse during the [[Matignon Accords (1936)|Matignon Accords]].<ref name=":4" />