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Certainly not in Spain where there was a savage Guerilla war against the French. The French did not really try to impose French culture on Spain, rather they continued with the same policies of Terror which they had applied in the Vendée and Toulon in France during the Revolution. The Disasters of War paintings by Goya were a response to the Napoleonic Terror.

In the Netherlands there had long been a strong French cultural influence even when the two countries were at war. The Dutch generally seem to have welcomed the reforms Napoleon brought and the rule of Louis Napoleon, but not their annexation to France.

I don't think that this is right