June – A French expeditionary force (some 18,000 men) led by King Louis VII departs from Metz and travels through Bavaria. Louis is accompanied by the French nobility and his wife, Queen Eleanor of Aquitaine, heiress of France. At Regensburg – where it arrives on June 29, the Crusaders journey peaceably for fifteen days through Hungary and reach the Byzantine frontier at the end of August.
September 7 – The German crusaders suffer a natural disaster near Constantinople, when part of their encampment is swept away by a flash flood with considerable loss of life. Emperor Manuel I (Komnenos) orders the Crusaders to cross to Asia Minor by the Hellespont. Conrad III ignores the advice of Manuel and after some minor clashes with the Byzantines, pushes towards Constantinople.
September 10 – The German crusaders under Conrad III reach Constantinople – where there is a frosty exchange of letters between Conrad and Manuel I. The German forces make camp at Galata on the northern shore of the Golden Horn. Manuel orders that a full-scale effort must be made to transport the Germans across the Bosporus, who are causing troubles by sacking the Philopatium.
Autumn – Conrad III decides not to wait for the French and crosses the Bosporus into Asia Minor. He leads the German crusader army to Nicomedia, and divides his forces into two divisions. Conrad takes the knights and his professional soldiers across Seljuk central territory – while the baggage train, pilgrims and a defending force under Bishop Otto of Freising travel along the Aegean coast.
October 4–5 – Louis VII arrives at Constantinople and joins with forces from Savoy under Amadeus III (his uncle) – who have taken the land route through Italy. Louis crosses the Bosporus, and leads the French crusader army into Asia Minor – where he hears in Nicaea of Conrad's defeat at the end of October. Louis sends a military escort for Conrad and agrees to rendezvous at Lopardium.
The German crusaders under Otto of Freising follow the coastal road before turning inland, up the Gediz River valley to Philadelphia. Otto's force is ambushed by the Seljuk Turks, just outside Laodicea, losing many man killed or taken prisoner. Otto and the survivors struggle on to Adalia from where they sail for the Holy Land. Others, attempt to continue along the southern coast of Anatolia.
October 25 – Battle of Dorylaeum: The German crusaders under Conrad III are defeated by the Seljuk Turks led by Sultan Mesud I. Conrad is forced to turn back and is during the retreat to Nicaea wounded by arrows. In Seljuk territory the Crusaders are harassed all the way and demoralised by the intensified attacks. Many of the weakest people fall behind and are captured by the Muslims.
November – The combined forces of Louis VII and Conrad III meet at Lopardium and march along the coastal road via Pergamon and Smyrna to Ephesus – where they celebrate Christmas. Conrad still suffering from his wounds, sails back to Constantinople to be placed under the care of Manuel's own physicians. Meanwhile, the Crusader camp is attacked by Turkish raiders near Ephesus.
December 24 – Battle of Ephesus: The French crusaders under Louis VII leave Ephesus, and ascend the Meander Valley. Louis is warned by messengers of Manuel, that Seljuk and Danishmendid forces are assembling west of Adalia. Louis ignores the advise and successfully fends off an ambush just outside Ephesus.
Battle of Bosra: A Crusader force under King Baldwin III fights an inconclusive battle against Seljuk forces from Damascus led by Mu'in al-Din aided by Nur al-Din's contingents from Aleppo and Mosul. Baldwin retreats to Jerusalem, while the Seljuk Turks attack his rearguard and stragglers underway back to Palestine.