The 42nd Division transferred from Adam's III Corps to Lieutenant General Michael Barker's I Corps on 19 May 1940, nine days after the German Army invaded France, as the division moved into the front line on the River Escaut. On 17 May, Brigadier John Smyth's 127th Brigade was detached to join "Mac Force", under Major General Noel Mason-MacFarlane, temporarily leaving the division with two brigades, returning on 20 May. After the speed of the German advance, the division, along with the rest of the BEF, was forced to retreat to Dunkirk, and was evacuated from Dunkirk on 31 May/1 June, having suffered significant casualties. Around this time the 42nd Division gained its first and only Victoria Cross (VC) of the Second World War, belonging to Captain Marcus Ervine-Andrews of the 1st Battalion, East Lancashire Regiment, of the 126th Brigade. In addition to being one of the first VCs won by the British Army during the Second World War, he was also the first Irishman to be awarded the medal during the war.