A successful Dieppe Raid and the timing of D-Day

If the 1942 Dieppe Raid had begun on time and succeeded, would a cross-Channel invasion have followed in 1943?

The German reaction matters more than the raid's tactical result. Heavier coastal fortification could delay invasion, while complacency and a captured port could accelerate it.

The tactical success of the raid does not by itself determine the invasion date. If Germany answered a successful Dieppe by strengthening the Atlantic coast, the Allies would need an even larger operation and might delay D-Day. If German leaders instead treated the raid as proof that they could eject any landing, Allied planning might accelerate. Successfully taking a port would also change the chosen beaches and reduce the pressure that produced the Mulberry harbour solution. The enemy's interpretation and response become the key variables in the counterfactual.