In the year 559 AH, the Battle of Harim was fought, resulting in a decisive victory for Muslim forces led by the 'Just King,' Nur al-Din Mahmoud Zangi against the Crusader troops. This battle followed a significant setback for Zangi at the Battle of Biqua, which left a profound mark on him, prompting a solemn vow not to take shelter until he avenged the Muslims from the invaders. Zangi's determination marked a pivotal turn in the ongoing conflict in northern Syria, focused on reclaiming lost ground from the Crusaders.

Following his defeat at Biqua, Zangi began preparations for a large-scale military campaign targeting Harim and its formidable fortress, recognized for its strategic position along the road between Antioch and Aleppo. This site became crucial in the struggle for dominance in northern Syria, and Zangi's forces would take advantage of the absence of Crusader troops in some regions. Historian Imad ad-Din al-Isfahani documents Zangi's tactical movements, highlighting how he gathered his army and Shaped an offensive that led to a successful confrontation at Harim, culminating in significant losses for the Crusaders, including many killed and captured.

The aftermath of the Battle of Biqua had a lasting impact on Nur al-Din Zangi's military strategies and policies. His vow and subsequent actions illustrated his resilience and commitment to the cause, emphasizing the criticality of Harim as not just a military target but as a symbol of Muslim resolve against Crusader expansion. The battle is not merely a moment in history but a testament to the enduring struggles faced by Muslim leaders during the Crusades, showcasing the complexities of alliances, betrayals, and the fight for territorial integrity in a fragmented region.