The spring proved to be a busy one; Johnson claimed three Fw 190s damaged two days later. On the 11 and 13 May he destroyed an Fw 190 to reach 10 individual air victories while sharing in the destruction of another on the later date and a Bf 109 on 1 June. A further five victories against Fw 190s were achieved in June. Two were claimed on the 15 June. On the 17 June while leading the wing over Calais Johnson bounced one of JG 26's "Gruppen" led by Wilhelm-Ferdinand Galland. He shot down "Unteroffizier" Gunther Freitag, 8./JG 26 who was killed. On 24 June he claimed one destroyed and one damaged on and another victory on the 27th to bring his total to 15.