German occupation of Belgium during World War I
... that Flemish separatists took the German occupation of Belgium during World War I as an opportunity to declare independence in 1918?
... that <a href="./Flemish_Movement" id="mwAzE" rel="mw:WikiLink" title="Flemish Movement">Flemish separatists</a> took the <b id="mwAzI"><a href="./German_occupation_of_Belgium_during_World_War_I" id="mwAzM" rel="mw:WikiLink" title="German occupation of Belgium during World War I">German occupation of Belgium during World War I</a></b> as an opportunity to declare independence in 1918?