The Crusades had attempted to retake the Holy Land from the Muslims but did not succeed. The Crusades can be said as the most important even of the Middle Ages because of their positive and negative effects.
One of the negative effects the Crusades had was the religious persecution. The Teutonic Knights where the German Crusaders in Palestine. Granada was the city in Spain, which were controlled by the Moors (Muslims). The hatred between the Muslim and Christians were one of the bigger negative effects that the Crusades had. The Muslims and Christians did not like each other a lot.
The Crusades had more positive effects than negative. One of the positive effects where the new products and ideas that were introduced into Europe. Since more people had free time, people thought of things that would be good to have. Many people invented small things to help them with their daily life.
English: Medieval miniature painting of the Siege ...
English: Capture of Jerusalem during the First Cru...
Europe and the Christian States in the East in 114...Some people thought up big ideas and products that can really help them grow faster. Some of the inventions they had were the plow, mill and horse harness. An idea that was thought up was three field planting. Three field planting was a system of planting in which three fields were used for planting, two at a time. This was good because it game one field a rest so the ground doesn't wear out. The Crusades also make eastern and western trade easier, which was very good because cities can get the food and supplies they needed without having a problem anymore. The Crusades also helped make the cities grow larger and encouraged the growth of money and banking more due to the people that did not have much to do.