Yet for Canadians it was our first major battle and a total disaster. This lovely little town was a FORTRESS, lying in wait for our landing in 1942. It didn't help that they knew we were coming, but either way, a small harbour/beach with gigantic cliffs at each end armed with gigantic guns. Known as Operation Jubilee
The raid was over by mid-day. In nine hours, 907 Canadian soldiers were killed, 2,460 were wounded, and 1,946 Canadians were taken prisoner— including more prisoners than the army lost later in 11 months during the Northwest Europe campaign of 1944-1945. In the air battle overhead, the RCAF lost 13 planes and 10 pilots, out of 106 Allied aircraft and 81 airmen lost overall.
As you can see the castle standing right on the coast, doesn't even have a bullet hole in it.
If you are interested in the story of Dieppe, this is a great youtube with interviews from survivors and historians.