Following the Battle of Berlin, No. 467 Squadron began to concentrate on targets in France and Belgium as the Allied air campaign shifted focus from strategic bombing to destroying airfields and disrupting lines of communication prior to the invasion of the continent. On the night of 10/11 April, Balmer led not only his own unit but a total of 148 aircraft of No. 5 Group RAF in an assault on Toulouse, striking at an airfield, and aircraft and explosives factories. The bombing was highly accurate, and the Australians suffered no losses on the raid.