After the First Crusade, four crusader states were established by the Christians
The four states were surrounded by enemies, vulnerable to attack and constant bickering between the Christian leaders
In July 1187, Saladin defeated the main Christian army in the Battle of Hattin in Israel; and attacked Jerusalem, which fell under his control in October 1187
Pope Gregory VIII sent a papal bull (official letter made by the Pope) that described the horrors of Christian treatment by Muslims, calling upon Christians to launch a new crusade with indulgence for anyone who died
The English crusading army left for the Holy Land in 1190, accompanied by two other armies, led by Frederick Barabarossa and Philip II
Richard gathered a force of approximately 17000 men in Sicily 1191 from the English and Angevin Empire