What caused the first crusade and what happened in it?

The first crusade was started by a speech spoken by pope Urban II to the Council at Clermont in 1095. The speech surprisingly appealed to much more of the public than expected and it led to a crusade that was lead by the holy man, Peter the Hermit. This group was full of non-prepared and fanatical Christians. Eventually, after many hardships, all in the group was slaughtered by the Muslims near the city of Nicaea.

 The next part of the first crusade was led by a group of barons from a number of different nations. A quick victory for the barons allowed them to control western Anatolia. After that, the group swept across the Mediterranean’s east coast and captured many different cities. Then they reached Jerusalem in July 1099 and took over the whole city, but they killed many innocent residents of the city. With Jerusalem, they established a kingdom along the Mediterranean’s east coast.