in total there were 9 crusades and the muslims won the joly war on jerusalem because they had control over the city last. out of the 9 the muslims won 5.
Most of the battles were fought near the holy city and some in modern day turkey.
The muslim cavalry shot crossbows and had hammers that they would use to debilitate their enemy so the infantry could finish them off. They also carried a circular shield.
The muslims did not ask for a war but the christians sure gave them one, one that the christians lost. The muslims got to stay in the land they originally owned.
Effects on modern Times
The crusades effect our modern times greatly. without them europe would have stayed in the dark ages and there would not be near as much technological advancement. the war set the course for history.