Answer:
1) The Crusades were religious wars between Christians and Muslims. The purpose of the wars were mainly to keep control of Holy sights that were controlled by both religions, and to gain political advantage.
2) The main regions that the wars were fought in was Western Europe and Northern Europe.
3) They had increased the power of the king, and the Holy Land got divided into four.
4) I think they got a Muslim resolve to win back territories but i am not sure...
