What problems did Napoleon have in Spain and Austria?

Answer 1

Napoleon made three basic mistakes in Spain:

a. He imposed an unpopular 'king' on the Spanish.

b. His method of feeding his army involved taking food by force from the locals rather than paying for it as did wellington. Thus, just about every Spaniard became an enemy causing him to waste troops on guarding duties.

c. His generals failed to alter their battle tactics in response to the success of the British line defence and so lost every major battle they fought against the British from Portugal right up to Paris (and beyond at Waterloo). They also did not know how to cope with the Guerilla warfare

There is of course much more to all of this but I believe in essence that these were his three big errors in Spain.

Answer 2

In Spain, Napoleon had to deal with strong nationalism from the people and guerrilla warfare. In Austria, Spanish resistance encouraged Austria to resume hostility. They also wanted revenge for an earlier battle loss