|St. John of Capistrano|
At the end of 1455, after a public reconciliation with all his enemies, Hunyadi began preparations. At his own expense he provisioned and armed the fortress, and, leaving in it a strong garrison under the command of his brother-in-law Mihály Szilágyi and his own eldest son László, he proceeded to form a relief army and a fleet of two hundred corvettes. As no other baron was willing to help (fearing Hunyadi’s growing power more than the Ottoman threat), he was left entirely to his own resources.
A Franciscan friar allied with Hunyadi, St. John of Capistrano, preached a crusade to attract peasants and yeomanry to Hunyadi’s cause. The recruits were ill-armed (many with only slings and scythes) but full of enthusiasm, and they flocked to the standard of Hunyadi, the core of which consisted of a small band of seasoned mercenaries and a few banderia of noble horsemen. All in all, Hunyadi managed to build a force of 25–30,000 men....
On July 14, 1456 Hunyadi arrived to the completely encircled city with his flotilla on the Danube while the Ottoman navy lay astride the Danube River. He broke the naval blockade on July 14, sinking three large Ottoman galleys and capturing four large vessels and 20 smaller ones. By destroying the Sultan’s fleet, Hunyadi was able to transport his troops and much-needed food into the city. The fort’s defense was also reinforced.
But Mehmed II was not willing to end the siege and after a week of heavy artillery bombardment, the walls of the fortress were breached in several places. On July 21 Mehmed II ordered an all-out assault which began at sundown and continued all night. The besieging army flooded the city, and then started its assault on the fort. As this was the most crucial moment of the siege, Hunyadi ordered the defenders to throw tarred wood, and other flammable material, and then set it afire. Soon a wall of flames separated the Janissaries fighting in the city from their comrades trying to breach through the gaps into the upper town. The fierce battle between the encircled Janissaries and Szilágyi’s soldiers inside the upper town was turning in favour of the Christians and the Hungarians managed to beat off the fierce assault from outside the walls. The Janissaries remaining inside the city were thus massacred while the Ottoman troops trying to breach the upper town suffered heavy losses. When an Ottoman soldier almost managed to plant the Sultan’s flag on top of a bastion, a Hungarian knight grabbed him and together they plunged from the wall. (Read entire post.)