The Siege of Algeciras was a pivotal moment during the wider context of the Reconquista, reflecting the long-standing conflict between Christian kingdoms and Islamic territories in the Iberian Peninsula. Starting in 1342, the siege was initiated by King Alfonso XI of Castile, who desired to undermine Moorish control of the coastline. Algeciras, located in southern Spain, was a crucial naval port due to its strategic position overlooking the Strait of Gibraltar. The siege witnessed significant military ingenuity, particularly through the use of new gunpowder technology that was becoming increasingly prevalent in European warfare. This tactic played a role in transforming the nature of sieges in future conflicts.The siege continued for nearly two years, with both sides suffering heavy casualties. The Castilian forces faced a determined defense from the city's garrison. However, the deployment of cannon and other gunpowder-based weaponry marked a moment in military history where traditional methods of siege warfare began to give way to artillery. The siege concluded with the capture of Algeciras, which resulted in a decisive victory for the Castilians and a considerable blow to Moorish power in the region. The fall of Algeciras not only shifted the balance of power in the southern Iberian Peninsula but also opened up new maritime routes and opportunities for Christian control in the Mediterranean Sea.