Wikipedia
Flamenpolitik
Flamenpolitik ( German; "Flemish policy") is the name for certain policies pursued by German authorities occupying Belgium during World War I and World War II. The ultimate goal of these policies was the dissolution of Belgium into separate Walloon and Flemish components.
The German authorities aimed to exploit the longstanding linguistic problems in Belgium, particularly the systematic discrimination towards the Dutch language that existed before World War I. The policy was also based on Pan-Germanism. Kossmann concludes that the German policy of fostering separatism in Flanders was a failure well before the German surrender because it did not win popular support.