The Siege of Belgrade marked a significant conflict between the Kingdom of Hungary and the Ottoman Empire, led by Sultan Mehmet II in 1456. As the Ottoman Empire sought to expand its territory into Eastern and Central Europe, Belgrade became a key strategic location for both sides. John Hunyadi, the Regent of Hungary, rallied a diverse coalition comprising Hungarian forces alongside Serbian allies to fortify the defenses of the city. The siege commenced in early July and involved intense fighting, with Mehmet II employing a massive army and artillery to capture Belgrade, which was crucial to securing the northern approach to the Ottoman Empire.

Hunyadi’s defensive strategy involved utilizing the city's strong fortifications alongside tactical ambushes and counterattacks. The Hungarians exhibited remarkable resilience despite overwhelming odds, with numerous skirmishes taking place both within the city and in the surrounding areas. Hunyadi personally oversaw the defense, inspiring his troops, while strategic supply lines from nearby regions helped maintain morale and resources throughout the siege. The turning point came when a surprise counter-offensive, known as the Great Christian Army, caught the Ottomans off-guard, leading to a decisive Hungarian victory.

The repercussions of the siege were felt throughout Europe. Hunyadi’s success not only solidified his reputation as a military leader but also temporarily halted the Ottoman advance into Europe, allowing Christian Europe to regroup and fortify its defenses. The victory at Belgrade inspired further resistance against Ottoman incursions and fostered unity among various Christian states, laying the groundwork for future alliances against the Ottoman threat. The siege was commemorated by subsequent generations, illustrating its importance in the struggle between the Christian and Muslim worlds during this period.