Over the next few decades Muslims in the Middle East increasingly came under common leadership. Salah al-Din united Egypt, Syria and lands of the east and he did not kill his prisoners like most crusades, instead he sold them for ransom.
In 1212, tens of thousands of peasant children from France and Germany marched in a "Children's Crusade". Few reached the Holy land, some made it as far as European port cities so they can be sold into slavery, some returned home,but many disappeared without a trace.
In 1191, Richard's army forced the surrender of the Palestinian town of Acre and then arrangements were made between the two sides to exchange prisoners. Richard then fought his way toward Jerusalem, but his army wasn't strong enough to attack.
Queen Isabella and King Ferdinand
The Crusades to the Middle East continued for another 100 years. Some crusaders were popular movements of poor people rather than organized military campaigns.
The Crusades warred against Muslims In Europe, North Africa, and the Middle East, these series of wars are called the Reconquista. Christians launched these wars so that they can retake the Iberian Peninsula.
In the late 1400s, Queen Isabella and King Ferdinand wanted to unite Spain as a Catholic country so they used Inquisition aganist Jews and Muslims. Isabella and Ferdinand also sent armies against Granada, who surrendered in 1492.