Meanwhile, an unknown proportion of northern European naval crusaders (from England and Germany) arrive at Acre. April–May – Louis VII and the French crusaders remain in Antioch, but there are rumours of an incestuous affair between Eleanor of Aquitaine and Raymond of Poitiers. Louis, alarmed for his honour, departs with his army to Jerusalem in late May. Meanwhile, Conrad III with his chief nobleman are welcomed by Queen Melisende and her 18-year-old son, co-ruler Baldwin III at Jerusalem. June – Mu'in al-Din Unur, Seljuk ruler (atabeg) of Damascus, prepares for war, and strengthens the fortifications of the city. He sends an urgent request for military assistance to the Zangid ruler Sayf al-Din. Unur orders his troops to destroy the water sources in areas that the Crusaders must cross. Seljuk governors of frontier provinces station scouting parties along the road to Damascus. June 24 – Council of Acre: Conrad III, Louis VII, Melisende and many other nobles join in a war council near Acre. They decide that Damascus rather than Edessa will be the primary target of the Second Crusade. July – The Crusaders under Baldwin III join forces with the Crusader armies of Louis VII and Conrad III (all together some 50,000 men) at Tiberias. They march up the Jordan Valley and cross into Zangid territory. July 24 – Zangid forces under Sayf al-Din arrive at Homs. Mu'in al-Din Unur sends a letter of ultimatum to the Crusader leaders to lift the siege of Damascus. Meanwhile, guerrilla attacks demoralise the Crusaders. July 28 – Siege of Damascus: The Crusaders are forced to withdraw from their siege of Damascus after only four days. First Conrad III, then the rest of the Crusader army, decides to retreat back to Jerusalem. September – The French crusaders raid the province of Damascus, in reprisal for the failure of their siege. Mu'in al-Din Unur takes his forces to the Hawran to protect the harvest and its transport to Damascus. September 8 – Conrad III sails from Acre to Thessaloniki and forms an alliance with Manuel I against King Roger II of Sicily. During his visit Henry II (Jasomirgott) marries Manuel's niece, Theodora Komnene. Europe February 1 – A small Crusader fleet of Genoese and English ships sets sail from Lisbon for the Holy land. The Anglo-Flemish Crusader fleet takes Oran. Siege of Tortosa: A multinational force under Ramon Berenguer IV besieges the Almoravid city of