Nevertheless, Dollmann was considered an experienced commander; there was no reason to think him incapable. Supporting this notion was an Allied report which identified Dollmann as an "expert in defense". Panzer Group West Commander Leo Geyr von Schweppenburg later confirmed that Dollmann had a much better understanding of the use of armored troops than was previously supposed. History was soon to prove that the German defenses were inadequate to repulse the massive and highly coordinated assault which took place on 6 June 1944.