The answer is : The crusades.
The Crusades were a series of religious wars between Christians and Muslims started primarily to secure control of holy sites considered sacred by both groups. In all, eight major Crusade expeditions — varying in size, strength and degree of success — occurred between 1096 and 1291.
Answer:
They reach a conclusion and stop fighting.
The diaphragm is the part that adjusts the light of the specimen
