Clairmarais aerodrome
... that the First World War Clairmarais aerodrome in France was utilised by the Luftwaffe from 1940 but proved to be unusable in wet weather?
... that the First World War <b id="mwB24"><a href="./Clairmarais_aerodrome" id="mwB28" rel="mw:WikiLink" title="Clairmarais aerodrome">Clairmarais aerodrome</a></b> in France was utilised by the <i id="mwB3A"><a href="./Luftwaffe" id="mwB3E" rel="mw:WikiLink" title="Luftwaffe">Luftwaffe</a></i> from 1940 but proved to be unusable in wet weather?