Why were German defenses in Normandy generally weaker than the Allies had expected?

German defenses in Normandy were less formidable than the Allies anticipated due to a combination of strategic deception, command inefficiencies, and shifting military priorities.

Key factors included:

• Strategic Deception: Through Operation Fortitude, the Allies successfully convinced the German high command that the primary invasion would occur at the Pas-de-Calais. Consequently, Germany stationed its most battle-ready troops there, and even after the Normandy landings began, the Germans withheld reinforcements, believing the Normandy assault was merely a diversion.123
• Command Structure: The German military suffered from a byzantine and inefficient command structure. Field commanders like Erwin Rommel and Gerd von Rundstedt faced restricted authority, and mobile armored reserves could not be deployed without Adolf Hitler’s explicit permission.45
• Troop Quality and Resources: Many of the troops defending the Normandy beaches, such as the 716th Static Infantry Division, were of varying quality, including older men and conscripts with limited combat experience and outdated equipment. Furthermore, the demands of other fronts had siphoned away many of Germany's best units, and the lack of air and naval support left the defenders vulnerable to Allied air supremacy.61