and Capua. The tribute to the pope of 600 schifati agreed upon by Roger II in 1139 at Mignano is affirmed and another 400 schifati is added for the new lands. 1158: The Treaty of Sahagún ends the war between Castile and León. 1160s 1161: the Song dynasty Chinese navy, employing gunpowder bombs launched from trebuchets, defeats the enormous Jin dynasty navy in the East China Sea in the Battle of Tangdao and on the Yangtze River in the Battle of Caishi. 1161: Kilij Arslan II, Sultan of Rum, makes peace with the Byzantine Empire, recognizing the emperor's primacy. 1161: In the siege of Ani, troops from the Kingdom of Georgia take control over the city, only to have it sold for the second time to the Shaddadids, a Kurdish dynasty. 1162: Genghis Khan, the founder of the Mongol Empire, is born as Temüjin in present-day Mongolia. 1163: The Norwegian Law of Succession takes effect. 1165–1182: Tensions and disputes between the Pagan Empire and the Kingdom of Polonnaruwa causes the Sinhalese under Parakramabahu the Great to raid Burma. 1168: King Valdemar I of Denmark conquers Arkona on the Island of Rügen, the strongest pagan fortress and temple in northern Europe. 1169: Political disputes within the Pandya Empire sparks the decade-long Pandyan Civil War. 1169: On May 1, the Norman invasion of Ireland begins. Richard fitzGilbert de Clare ('Strongbow') makes an alliance with the exiled Irish chief, Dermot MacMurrough, to help him recover his kingdom of Leinster. 1170s 1170: The Treaty of Sahagún is signed by Alfonso VIII of Castile and Alfonso II of Aragon. Based on the terms of the accord, Alfonso VIII agrees to provide Alfonso II three hostages, to be used as tribute payments owed by Ibn Mardanīš of Valencia and Murcia. 1170: On December 29, Thomas Becket is murdered in Canterbury Cathedral. 1171: Saladin deposes the last Fatimid Caliph Al-'Āḍid and establishes the Ayyubid dynasty. 1171: On November 11, Henry II of England lands in Ireland to assert his claim as Lord of Ireland. 1172: The Pandyan city of Madurai is sacked by the Sinhalese army due to an attempt to drive off the rival throne claimant, Kulasekara Pandyan. 1173: Sinhalese king Parakramabahu the Great gains a decisive victory by invading the Chola Empire as an ally of the Pandyas in the Pandyan Civil War. 1174: On July 12, William I of Scotland is captured by the