Fall Rot began the final phase of the Battle of France. JG 1 and its elements remained with VIII. "Fliegerkorps". I. "Gruppe" was based at Guise-Nord (Tupigny). JG 27 and units under its command flew 265 sorties in 17 missions on 6 June. By 16 June the advance had taken the "gruppe" to Romilly-sur-Seine with Stab/JG 27, I./JG 27 and I./JG 76. JG 27 had claimed 250 Allied aircraft destroyed in the campaign. The leading pilot attached to JG 27 was JG 1's Wilhelm Balthasar, the most successful of the period. I./JG 1 claimed 82 air victories during the Battle of France. "Oberstleutnant" Carl-August Schumacher was awarded the Knight's Cross on 21 July for commanding JG 1.