alt Hacker NewsHow many do you think were killed then, over those centuries of conflict? Several hundred thousand? What if we include deaths due to famine? How many were forced to migrate? Also several hundred thousand?
As I said, I'm not an expert; and you are right, it's not easy to find good sources for numbers about this. As far as I can tell were quite a few individual events with tens of thousands of people killed at a time. There were hundreds of recorded major battles.
The Reconquista lasted more than 700 years and the number of people killed in any given conflict is unknown, with estimates varying by orders of magnitude. Both sides tended to exaggerate casualties, including their own. It was a defacto holy war, and so large casualties on your side could be seen as a sign of great martyrdom and piety, while inflicting heavily casualties on the enemy was also framed as having God's favor - heads I win, tails you lose.
The only thing that's entirely clear is that it was very small scale for the overwhelming majority of the conflict, punctuated by a very small handful of "large" battles that would generally be considered moderate to small scale in modern times. There were certainly not hundreds of major battles. So I don't think anybody knows exactly how many were killed other than 'not that many.' Put another way - over some 700 years it's certain that far fewer people died than e.g. one large modern battle like the Battle of Stalingrad.
The greatest legacy of the era was defining, or at least solidifying, the character of Spain/Portugal and the more militant nature of Catholicism at the time. So for some context, Columbus would set sail for the New World just months after Grenada finally fell!