Weird question I know, but it makes sense to me. I was wondering if anyone happened to know any manga about the Crusades...well that or anime. One of my classes is on the Crusades and how it's interpreted in pop culture and stuff. AND he said we could do it on manga and anime. So, needless to say that made me happy. But, strangely enough, there isn't a list online of the mangas about that time period >.<
<3 Meri

P.S. It doesn't matter which Crusade nor what side is being spoken on. I know that doesn't really narrow it down seeing as they lasted...500 years or so. But, hey, that means at least ONE manga should have been written about the time period....right?

I've never read any of these, I just searched, so I don't know if they are any good...
Innocents Shounen Juujigun
Hana Junrei
and maybe Garden Dreams

I also recommend Vinland Saga, it takes place a bit earlier, but it's a great historical manga.

Berserk and Priest, neither are historical. And I should warn you on both that there's some gruesome content, especially in Berserk.