What was the reason for the Dieppe raid?

Answer 1

Find a weakness in German defenses and take over Dieppe.

The reasons were primarily political. Stalin harassed Churchill to open a war in Western Eupore and relieve pressure from Russia, lest Russia seek a separate peace with Germany......in which case the bulk of the German war machine would be free to fight Great Britain. Rather than mount a large invasion which might fail, it was decided to send a smaller force to capture and hold Dieppe, one of the channel ports on the French coast. Only seven regiments would be committed, and no warships other than destroyers. Thus, if the operation failed (which it did), not much would be lost, and it would still be a gesture of support to the USSR from Great Britain.

Answer 2

"Lessons learned :

Mountbatten later justified the raid by arguing that lessons learned at Dieppe in 1942 were put to good use later in the war.[24][page needed] He later claimed, "I have no doubt that the Battle of Normandy was won on the beaches of Dieppe. For every man who died in Dieppe at least ten more must have been spared in Normandy in 1944."[25] The amphibious assaults at North Africa were only three months away. The more successful Normandy landings took place two years later, in 1944.

Following the experience at Dieppe, the British developed a whole range of specialist armoured vehicles which allowed their engineers to perform many of their tasks protected by armour, most famously Hobart's Funnies. These vehicles were used successfully in the British and Canadian landings in Normandy in 1944. Improvements were also made in shore-to-sea communications, and many more and bigger ships were used for ship-to-shore bombardment." ~ Excerpt from Wikipedia ; see related link below for the full article .