What does the origin of many of the routes demonstrate about europe and the crusades?

Origin of many routes in Europe brought the strong empires that are Byzantine Empire and Turks directly into contact and conflict was unavoidable. In the eleventh, twelfth and thirteenth centuries crusades or military expeditions were launched by Christians to get the control of holy land (Jerusalem) under Muslim rule. The crusades declare war in the name of religion to mobilize more people and to justify the war efforts.

this isn't a question and if you're going to list things be kind and use commas.