Originally Posted by Yōḥānān
The entire ideological movement of the Crusades influenced the Reconquista in every aspect. To be honest before this thread I was not even aware that some of these decisive battles were considered direct acts of Crusade. To me the relevance of the Crusades in the Reconquista is undeniable.
THat may be exactly why I habe been explicitly not denying it all along this nice thread.
The exact measurement or estimation of such contribution is another entirely different and much more controversial story.
As a whole the contribution of any non-Peninsular Christian armies to the Reconquista ever recruited by the Papacy was minimal at best.
Besides, the Reconquista was always a primarily political far more than religious struggle; Muslim ad Christian states constantly switched alliances with each other.
The religious ideology was exacerbated only by the XI-XII centuries, not for any alien influence but fundamentally due to the invasions from the African desertic regions of fanatically radical new Muslim converts, fundamentally the Almoravides and the Almohades.
Lisbon was presumably the most relevant crusader contribution to the Reconquista.
Conquered by the some Norwegian Crusaders in 1108, it was conquered again by the Muslims (Almoravids) in 1111; so it required to be freed again by Alfosnso I of Portugal with the help of the II Crusade (some 13,000 non local Crusaders) in 1147.
On the campaign of the critical aforementioned battle of Navas de Tolosa, the bulk of of the reportedly like 30,000 predominantly French Crusaders actually laergely massively deserted after the conquest of Calatrava la Vieja and Malagón, where their fanatiic cruelty against pacific Muslims and Jews was extremely problematic for the local Christian rulers.
The bulk of such Crusaders were simply absent of this critical battle itself.
And little, very little additional objective military contribution from any Papal Crusade is discernible all along eight centuries.
So you should excuse me if I'm not particularly impressed by some typically opportunistic claims from some biased sources of the Catholic church itself.
On the other hand, this is admittedly a complex field well beyonfd the purely military issues that would no doubt deserve its own ad hoc thread.
Particularly because the extensive and complex Reconquista period was only tangentially related with the OP.