The crusaders decided to attack Damascus from the west, where orchards would provide them with a constant food supply. Having arrived outside the walls of the city, they immediately put it to siege, using wood from the orchards. On 27 July, the crusaders decided to move to the plain on the eastern side of the city, which was less heavily fortified but had much less food and water. Nur ad-Din Zangi arrived with Muslim reinforcements and cut off the crusaders' route to their previous position. The local crusader lords refused to carry on with the siege, and the three kings had no choice but to abandon the city. The entire crusader army retreated back to Jerusalem by 28 July.
Both faced disastrous marches across Anatolia in the months that followed, and most of their armies were destroyed. Louis abandoned his troops and travelled by ship to the Principality of Antioch, where his wife Eleanor of Aquitaine's uncle, Raymond, was prince. Raymond expected him to offer military assistance against the Seljuk Turks threatening the principality, but Louis refused and went to Jerusalem to fulfil his crusader vow. Conrad, stricken by illness, had earlier returned to Constantinople, but arrived in Jerusalem a few weeks later in early April 1148. The original focus of the crusade was Edessa, but in Jerusalem, the preferred target of King Baldwin III and the Knights Templar was Damascus.
Some of the barons native to Jerusalem pointed out that it would be unwise to attack Damascus, as the Burid dynasty, though Muslim, were their allies against the Zengid dynasty. Imad ad-Din Zengi had besieged the city in 1140, and Mu'in ad-Din Unur, a Mamluk acting as vizier for the young Mujir ad-Din Abaq, negotiated an alliance with Jerusalem through the chronicler Usama ibn Munqidh. Conrad, Louis, and Baldwin insisted, Damascus was a holy city for Christianity. Like Jerusalem and Antioch, it would be a noteworthy prize in the eyes of European Christians. In July their armies assembled at Tiberias and marched to Damascus, around the Sea of Galilee by way of Baniyas. There were perhaps 50,000 troops in total.
The general view now appears to be that the decision to attack Damascus was somewhat inevitable. Historians, such as Martin Hoch, regard the decision as the logical outcome of Damascene foreign policy shifting into alignment with the Zengid dynasty. King Baldwin III had previously launched a campaign with the sole objective of capturing the city. This damaged the Burid dynasty's relations with the Kingdom of Jerusalem.
Fiasco at Damascus
Siege of Damascus, Second Crusade
The crusaders decided to attack Damascus from the west, where orchards would provide them with a constant food supply. They arrived at Daraiya on 23 July, with the army of Jerusalem in the vanguard, followed by Louis and then Conrad in the rearguard. The densely cultivated gardens and orchards would prove to be a serious obstacle for the crusaders. According to William of Tyre, the crusader army was prepared for battle:
At Daria [Darayya], since the city was now so near, the sovereigns drew up their forces in battle formation and assigned the legions to their proper places in the order of march...Because of its supposed familiarity with the country, the division led by the King of Jerusalem was, by common decision of the princes, directed to lead the way and open a path for the legions following. To the King of the Franks [Louis VII] and his army was assigned the second place or centre that they might aid those ahead if the need arose. By the same authority, the Emperor [Konrad III] was to hold the third or rear position, in readiness to resist the enemy if, perchance an attack should be made from behind.
The Muslims were well prepared and constantly attacked the army advancing through the orchards outside Damascus on 24 July. These orchards were defended by towers and walls and the crusaders were constantly pelted with arrows and lances along the narrow paths.
Crusader King Conrad III in a 13th-century miniature
On Saturday 24 July the crusaders began with an attack in the morning along the banks of the Barada river. There was ferocious combat in the orchards and narrow roads between the Christian force and a mixture of professional troops of Damascus, the ahdath militia and Turkoman mercenaries. William of Tyre reported:
The cavalry forces of the townsmen and those who had come to their assistance realized that our army was coming through the orchards in order to besiege the city and they accordingly approached the stream which flowed into the town. This they did with their bows and their balistas [crossbows] so that they could fight off the Latin army...The emperor [Konrad], in command of the forces following, demanded to know why the army did not advance. He was told the enemy was in possession of the river and would not allow our forces to pass. Enraged at this news, Konrad and his knights galloped swiftly forward through the king's lines and reached the fighters who were trying to win the river. Here all leaped down from their horses and become foot soldiers, as is the custom of the Teutons when a desperate crisis occurs.
The historian David Nicolle wrote that William of Tyre did not explain how Conrad was able to bring his forces up from the rear to the front without totally disorganizing the Christian army". According to Syrian chronicler
Despite the multitude of ahdath [militia], Turks, and common people of the town, volunteers and soldiers who had come from the provinces and had joined with them, the Muslims were overwhelmed by the enemy's numbers and were defeated by the infidels. The latter crossed the river, found themselves in the gardens and made camp there...The Franks...cut down trees to make palisades. They destroyed the orchards and passed the night in these tasks.
Thanks to a charge by Conrad, the crusaders managed to fight their way through and chase the defenders back across the Barada river and into Damascus.
Having arrived outside the walls of the city, they immediately put it to siege, using wood from the orchards. The crusaders began to build their siege position opposite the Bab al-Jabiya gate where the Barada did not run past Damascus. Inside the city the inhabitants barricaded the major streets, preparing for what they believed to be an inevitable assault. Unur had sought help from Saif ad-Din Ghazi I of Mosul and Nur ad-Din Zangi of Aleppo, and led an attack on the crusader camp; the crusaders were pushed back from the walls into the orchards, where they were prone to ambushes and guerrilla attacks. During the counter-attack on Sunday, 25 July, the Damascus forces took heavy losses which included the 71-year-old lawyer and well known scholar named Yusuf al-Findalawi, the Sufi mystic Al-Halhli and soldier Nur al-Dawlah Shahinshah. According to William of Tyre, on 27 July the crusaders decided to move to the plain on the eastern side of the city, which was less heavily fortified but had much less food and water. During a raid on the crusader camp on 26 July, according to Abu Shama:
A large group of inhabitants and villagers...put to flight all the sentries, killed them, without fear of danger, taking the heads of all the enemy they killed and wanting to touch these trophies. The numbers of heads they gathered was considerable.
There were conflicts in both camps: Unur could not trust Saif ad-Din or Nur ad-Din not to conquer the city if their offer of help was accepted; and the crusaders could not agree about who would receive the city if they captured it. Guy Brisebarre, lord of Beirut, was the suggestion of the local barons, but Thierry of Alsace, Count of Flanders, wanted it for himself and was supported by Baldwin, Louis, and Conrad. It was recorded by some that Unur had bribed the leaders to move to a less defensible position, and that Unur had promised to break off his alliance with Nur ad-Din if the crusaders went home. Meanwhile, Nur ad-Din and Saif ad-Din had by now arrived at Homs and were negotiating with Unur for possession of Damascus, something that neither Unur nor the crusaders wanted. Saif ad-Din apparently also wrote to the crusaders, urging them to return home. With Nur ad-Din in the field it was impossible to return to their better position. The local crusader lords refused to carry on with the siege, and the three kings had no choice but to abandon the city. First Conrad, then the rest of the army, decided to retreat back to Jerusalem on 28 July, though throughout their retreat they were followed by Turkish archers who constantly harassed them.