[lenkite]

Depends on your definition of crusade and success. https://en.wikipedia.org/wiki/Reconquista - without that Spain would still be Islamic, so would Portugal.

[skissane]

Historians disagree on how to define “the Crusades”. The traditional definition only includes Christian attempts to reconquer “the Holy Land”, and by that definition the Reconquista was a separate thing. Other historians support broader definitions which include the Reconquista, wars against the remnant non-Christian populations of the Baltics, religious wars against Christian heresies such as the Cathars/Albigenses and proto-Protestants such as the Hussites, etc

However, given that the historical crusades in Israel/Palestine have rather dubious relevance to the contemporary conflict, other “crusades” fought thousands of kilometres away are of even more dubious relevance