Second Crusade

Second Crusade. The Second Crusade (1147–1150) was a major military campaign sanctioned by the Catholic Church in response to the fall of the County of Edessa to the Zengid dynasty in 1144. Preached by Bernard of Clairvaux and led by European monarchs Louis VII of France and Conrad III of Germany, the campaign aimed to reinforce the Kingdom of Jerusalem and recapture lost territory. Despite simultaneous campaigns in the Iberian Peninsula and against the Wends, the main armies were decisively defeated in Anatolia and at the Siege of Damascus, resulting in a catastrophic failure that weakened the Crusader states and strengthened Muslim unity under Nur ad-Din.

Background and causes

The immediate catalyst for the call to arms was the conquest of the County of Edessa by the formidable atabeg Imad ad-Din Zengi in December 1144. Edessa was the first Crusader states established after the First Crusade and its loss sent shockwaves throughout Latin Christendom. Appeals for help from Queen Melisende and Patriarch Fulcher of Jerusalem reached Pope Eugene III, who saw the fall as a dire threat to the entire Outremer project. The broader geopolitical context included rising Muslim power under the Zengid dynasty, internal divisions among the Crusader states, and a desire among European nobility to demonstrate piety and martial prowess. The papal bull Quantum praedecessores, issued in 1145 and reissued in 1146, formally called for a new expedition, framing it as a spiritual duty to defend the Christian East.

Preaching and recruitment

The primary architect of the crusade’s recruitment was the charismatic Cistercian abbot Bernard of Clairvaux. His powerful sermon at Vézelay on Easter 1146, attended by Louis VII of France, successfully galvanized the French nobility. Bernard subsequently traveled to the Holy Roman Empire, where he persuaded the initially reluctant Conrad III of Germany to take the cross at a diet in Speyer. Bernard’s preaching also inspired the controversial and unauthorized Rhineland massacres of Jews by a rogue preacher, Rudolf the Monk, which Bernard sought to suppress. The recruitment created two massive royal armies and also authorized peripheral campaigns: the Siege of Lisbon by a combined force of Anglo-Normans, Flemings, and Portuguese, and the Wendish Crusade against pagan Slavs in the Baltic region.

Military campaigns

The German contingent under Conrad III of Germany took the land route through Hungary and into Byzantine territory. Despite warnings from Manuel I Komnenos, Conrad’s army was annihilated by the forces of the Seljuk Sultanate of Rûm at the Battle of Dorylaeum in October 1147. The French army under Louis VII of France fared slightly better but was also mauled in Anatolia during the Battle of Mount Cadmus. The remnants of both armies regrouped in Antioch, under its prince, Raymond of Poitiers, before proceeding to the Kingdom of Jerusalem. In 1148, the disastrous Siege of Damascus was launched by the combined Crusader leadership, including King Baldwin III of Jerusalem. The attack on a previously neutral Muslim ally lasted only four days and ended in a humiliating retreat, fatally undermining Crusader credibility and diplomacy.

Aftermath and consequences

The complete failure of the military objectives had profound repercussions. It severely damaged the prestige of the European monarchy and the moral authority of the Catholic Church, while cementing the reputation of Nur ad-Din as the leading champion of Islam. The event accelerated the unification of Muslim territories in Syria and Egypt, directly paving the way for the rise of Saladin. Within the Crusader states, the defeat intensified factional strife, particularly between the court of Jerusalem and the principality of Antioch. The only lasting success came from the parallel campaign in the Iberian Peninsula, where the capture of Lisbon in 1147 during the Reconquista was a significant victory for Afonso I of Portugal.

Historiography and legacy

Contemporary chroniclers like Odo of Deuil and Otto of Freising struggled to explain the defeat, often blaming Byzantine treachery or Crusader sin. The event forced a theological and strategic reevaluation of the entire crusading movement. Later historians, from David Nicolle to Jonathan Phillips, have analyzed its role in fostering a more coherent Muslim opposition and its impact on the evolution of crusade ideology. The Second Crusade’s legacy is one of catastrophic failure, which stands in stark contrast to the success of the First Crusade and set the stage for the urgent calls that would lead to the Third Crusade following the loss of Jerusalem in 1187. Its history is a pivotal case study in the complexities of medieval holy war, interfaith relations, and transcontinental logistics.

Category:Crusades Category:12th-century conflicts