D. Speak their native language
I would say the Middle east. Specifically the region of the Holy Land (Jerusalem) in Palestine.
The main point of the crusades was the take that land into the possession of the Christians.
Hope that helps
Volunteer soldiers. In America, there are no enlisted men, only citizens willing to give up their lives for their country. But during a serious war, there can be soldiers being deployed against their will so that there are more soldiers to help during the war.
