 On 10 May 1940, Germany invaded Belgium and the Netherlands, and on the next day, a German air attack against 114 Squadron's airfield at Vraux destroyed six of the squadron's Blenheims, with the rest of aircraft being damaged.Although the squadron did fly a few bombing missions against the German advance, its losses meant it was soon evacuated back to the UK, with its remaining Blenheims (along with those of 139 Squadron) being used to reinforce the British Expeditionary Force Air Component's reconnaissance squadrons.The squadron rejoined 2 Group on 10 June 1940, attacking concentrations of barges in the German-held channel ports and Luftwaffe airfields by night.