Links for information for the Islam/Christianity CC essay
http://www.roman-emperors.org/basilii.htm This is an article about the Byzantine Empire in 1000AD, under the rule of Basil II. More information than you would ever need to know about the BE. However, does tell you about conquering, Christianizing Bulgaria and Kiev, deploying armies, role of religion and politics, etc.
http://renaissance.com.pk/junrefl2y1.html Islam & Christianity