Alain,
A little info on RAF Bomber Command diary:
http://www.raf.mod.uk/bombercommand/aug44.html
15 August 1944
1,004 aircraft - 599 Lancasters, 385 Halifaxes, 19 Mosquitos, 1 Lightning - attacked 9 airfields in Holland and Belgium in preparation for a renewed night offensive against Germany. Visibility was perfect and all raids were considered successful. 3 Lancasters lost.
If you follow link, then you have two pics of the bombed airfields in Belgium.
Groet,
Leendert