Napoleon was well-known for propaganda in the publication Moniteur. A particular example is the presentation of the British victory at Talavera as a crushing French victory. In mitigation, Napoleon was often misled as to numbers, casualties and results by his Marshals (Soult and Marmont being notably less than scrupulous about the facts), however, he continually presented the situation in Spain as being stable and settled and a fait accompli instead of telling the truth. I suppose therefore you could argue that the Napoleonic conquest or subjugation of Spain never really took place, certainly not to the extent presented in the French government publications.