Long devastating war between Christians and Muslim

crusades

Explanation:

the crusades were a series of religious war between Christians and Muslims started primarily to secure to control of holy sites considered sacred by both groups .in all ,eight major crusades expenditions occurred between 1096 and 1219

i don't see how you want other people to do your work for you and it is like you are just handing your assignment to anybody else and having them deal with it instead of your self i thought this site was for asking questions and somebody could you on it not just handing your work to somebody else to deal with it just saying don't mean to be mean just proving a fact.

explanation:

i would go with the last one