What did the defeat in Spain and Portugal do to Napoleon's prestige?

Answer 1

Except for a brief spell Napoleon was not there, but his troops were and Marshals who were good in other places were not so good in Spain. Only Suchet would get a Spanish Title & I don't think he ever fought the British. Wellington did say of Fuentes de Onoro that had Napoleon been there he would have been beat.( Wellington means he would have been defeated) As Marshal Jourdan says to Napoleons brother King Joseph at Vittoria 'Well Sire, you have had your battle & it seems it was a defeat !'