During the An Shi Rebellion, which erupted in 755 and lasted for nearly a decade, the Tang dynasty found itself embroiled in a devastating civil war that led to the loss of several major cities, including Luoyang, which had served as a secondary capital. The rebellion, initiated by An Lushan and later continued by his successor Shi Si, created chaos across China and severely weakened the Tang government's control. As rebel forces overran Luoyang, the Tang court faced mounting pressures, prompting desperate measures to regain control of lost territories. In an effort to reclaim Luoyang, the Tang dynasty turned to the Huihe tribe for assistance, demonstrating the importance of tribal alliances in Chinese military affairs.The Huihe tribe, known for their formidable cavalry and knowledge of the region, provided critical support to Tang forces. This partnership was instrumental in a well-coordinated assault against the rebel-held Luoyang. The combined forces launched a surprise attack, capitalizing on the element of surprise and the weakening morale of the rebels. After intense fighting, the Tang dynasty successfully recaptured Luoyang, which not only restored the city to imperial control but also revitalized Tang authority in the northern regions. The fall of Luoyang was a significant psychological victory for the Tang dynasty, reaffirming their military capabilities and strategic alliances during a time of great upheaval.