The D-Day landings took place on 6 June 1944 without Brigade Piron, to the great disappointment of its 2,200 men but the British preferred to reserve them for the liberation of Belgium. (This policy was applied to all of the smaller national military contingents, which were expected to form the basis of post-war armies and for whom it would have been difficult to find replacements for casualties.) Piron lobbied the Belgian government in exile, which requested the British Government to send the Belgian troops to the front, to reverse the declining morale of those troops.