Nur ad-Din Zengi vs Philip III of France

Imad ad-Din Zengi besieged Damascus, attempting to expand his control over Syria. The siege failed due to strong defenses and the intervention of the Burid dynasty, preventing Zengi from unifying Muslim Syria under his rule.

Imad ad-Din Zengi, atabeg of Mosul, besieged and captured the Crusader city of Edessa. This was the first major Crusader territory to fall to Muslim forces, triggering the Second Crusade and establishing Zengi as a leading Muslim commander.

Imad ad-Din Zengi was assassinated by a Frankish slave in his sleep while besieging the fortress of Qal'at Ja'bar. His death fragmented his territories, which were divided between his sons Nur ad-Din and Saif ad-Din, but his legacy continued through Nur ad-Din's later successes.

Philip III's father, Louis IX, signed the Treaty of Corbeil, which renounced French claims to Catalonia and Roussillon in exchange for Aragonese renunciation of claims to Provence and Languedoc. Philip III inherited this settlement.

Philip III invaded Navarre to enforce his claim as regent for his niece, Joan I of Navarre. He secured control of the kingdom, which later passed to his son Philip IV through marriage, expanding French influence in the Pyrenees.

Philip III led the Aragonese Crusade, a papal-sanctioned invasion of Aragon to depose King Peter III. The French army was defeated at the Battle of the Col de Panissars and forced to retreat, suffering heavy losses. Philip III died during the retreat.