So let's just make sure we have a good hold on the context. So over here we have our timeline. It's occurring during the High Middle Ages. In other videos, we saw the first Crusades start at the end of the 11th century, started really by Pope Urban II with the purported reason to help the Byzantines take land from the Muslims, especially the Holy Land. The first Crusade is, for the most part, successful, but they don't return that land to the Byzantines. They set up what are known as Crusader States or Crusader Kingdoms, including the Kingdom of Jerusalem. And just to read this timeline that I drew up here, green shows the time period when at least Jerusalem is controlled by the Muslims.