I. and II. "Gruppe" of JG 2 were also sent to form the interception force against the Schweinfurt–Regensburg mission in August, reached the battle area and disappeared without apparent repercussions. III./JG 1 reached the bombers and then broke up to look for stragglers. Josef Priller, commanding JG 26, and NJG 1, made a formal complaint against them for not mounting a single concerted attack and denounced them as "Leichenfledderei" (corpse-looters). II. "Gruppe" contributed a single claim against a Spitfire en route to base. One "gruppe" reached the bombers at some point, and claimed four. Three "Staffelkapitäne" were killed in action with US aircraft in August, and a fourth by RAF Spitfires. On 6 September JG 2 achieved an increasingly rare success; the US Eighth Air Force attacked Stuttgart, losing 45 bombers—Mayer claimed three of them in 19 minutes over France. On 23 September, the wing suffered 12 casualties on a single day in action with the Eighth. During the month, JG 2 and JG 26, still operating as the Channel Front wings, were the only fighter units expanded to 12 "staffeln" despite Galland's efforts to expand the RLV force.