Through the opening of the campaign in the west, in May 1940, I./JG 20 met very little aerial opposition covering the advance into Holland and then Belgium. Instead, all attention was focused on the dramatic breakthrough to the south. Indeed, it was only on the day the unit transferred to airfields at Ghent, on 29 September, against the Allied evacuation at Dunkirk, that Schnell got his first victory - an RAF Spitfire. The rest of the French campaign was very quiet - a second victory on 11 June - as JG 51 pushed west down the French coast. But as most other fighter units were sent home to rest before the expected battles with the RAF, JG 51 (and I./JG 20) was left on overwatch on the English Channel. Far from being a quiet respite, it yielded three further victories for Schnell over the next weeks.