The German's crusader, contains Franconia, Bayern, and Swabia, leave their motherland on May 1147. Ottokar III from Stvaria joins Conrad in capital of Austria, and Conrad's enemy, Geza II from Hungary, finally let them pass. When 20.000 German's army arrived in Byzantine's territory, Manuel afraid that they will attack Byzantine. They have minor battle near Philippopolis and Adrianopel, where Byzantine's general, Prosouch, fight against Conrad's nephew, which become Emperor Frederick. Some German army killed by flood on early September.
On September 10th, they have arrived in Constantinople, and the German's army crosses to Asia Minor soon as possible. Conrad refuses to help Manuel to defense from Roger II who takes a change to capture cities of Greece, although he is Roger's enemy.
In Asia Minor, Conrad chooses to not waiting France's army, and going forward attacking Iconium, Rum Empires capital. Conrad separated his army into two divisions. Conrad led one of the divisions that almost crushed by Seljuk on October 25th, 1147 on the second battle of Dorylaeum.
The Turkey Seljuk use tactics pretend to retreat, and then ambush small German's cavalry that separated from their main army because following them. Conrad retreat step by step to Constantinople, and his army disturbed by Turkey Seljuk everyday, that attack and defeat Conrad's front guard. Conrad wounded when fight them. The other divisions, lead by Otto from Freising, forward to South to Mediterranean cost and defeated on early 1148.
Taken and translate from Wikipedia Indonesia "Perang Salib Kedua" (English: The Second Crusade).