allied advance from paris to the rhine battle of aachen battle of britain battle of dunkirk battle of fort eben-emael battle of france battle of hannut battle of maastricht battle of overloon battle of rotterdam battle of zeeland battle of the bulge battle of the grebbeberg battle of the netherlands battle of the scheldt colmar pocket dieppe raid end of world war ii in europe england hans graf von sponeck henri winkelman italian invasion of france luftwaffe north sea ockenburg royal netherlands air force royal netherlands army the hague valkenburg western allied invasion of germany wilhelmina of the netherlands