The German Invasion of France and Belgium (Blitzkrieg) begins on 10 May 1940. Hornet Squadron's tactics are soon proved dangerously inadequate, especially to the pilots flying at the rear. In the first days, three inexperienced pilots are killed without the rest of the squadron even seeing the German Me-109 fighters that shoot them down. Whilst escorting a bomber attack against German ground forces, 'Moke' Miller is badly wounded and later dies in hospital. The remaining pilots at first doubt and then despise the outmoded tactics but Rex refuses to alter them. A bombing raid leaves Rex badly injured by shrapnel but he conceals his wounds from the other pilots and strong painkillers leave him euphoric and overconfident. Recklessly ordering Hornet Squadron to attack a much larger German formation, Rex dives down to his death but another pilot orders the others not to follow, several of the pilots deliberately crowding Barton's plane, preventing him from following Rex.