How did Erwin Rommel disagree with Gerd von Rundstedt about defending Normandy?

The disagreement between Field Marshal Erwin Rommel and Commander in Chief West Gerd von Rundstedt regarding the defense of Normandy centered on the strategic positioning of German tank divisions.12

Drawing on his experience with Allied air superiority in North Africa, Rommel believed that the only way to prevent the Allies from establishing a bridgehead was to position armored reserves immediately behind the coastal defense works, allowing for rapid counterattacks. He warned that if these forces were held further back, Allied aircraft would destroy them as they attempted to advance toward the coast.21

Conversely, Rundstedt favored a more traditional military approach. He insisted on keeping the tank divisions in reserve farther behind the lines, arguing that this would maximize the forces' potential range of movement once the actual location of the invasion became clear. This fundamental strategic dissonance weakened the effectiveness of the German defense when the invasion ultimately occurred.2