10500 men were committed for Jubilee (mostly but NOT ALL Canadians) ,and the losses (WIA included) were some 4300 = 40 %:I don't see that losses of 40 % can be used to claim that an operation was a disaster. The aim of Jubilee ? The plan was t conduct a major division size raid (in fact it was a brigade size raid) on a German held port at the French chanel coast :this was done and to hold it for the duration of at least 2 tides :here there was a problem :the troops did not succeed to hold it for the expected duration. but OTOH,the majority of the men returned,and,would that not ofset the failure to hold the port for the expected duration ? Whatever, IMHO, it is a big,very big exaggeration to label Jubilee as a disaster .