Johnson scored more success in July. The USAAF began Blitz Week; a concentrated effort against German targets. Escorting American bombers, Johnson destroyed three Bf 109s and damaged another, the last being shot down on 30 July; his tally stood at 18. There was still no standard formation procedure in Fighter Command, and Johnson's use of the finger-four made the wing distinct in the air. It earned 144 Wing the nickname "Wolfpack". The name remained until 144 Wing was moved to an Advanced Landing Ground (ALG) at Lashenden and was renamed No. 127 Wing RCAF, part of the RAF Second Tactical Air Force under the command of No. 83 Group RAF.