Besides the battle of Independence this coming 4th of July we can also direct our thoughts to the Siege of Belgrade which lasted from the 4th until the 22nd of July. It was during this battle that we also see the appearance of the noon bell.
Wikipedia [here] notes the following:
The Siege of Belgrade occurred from July 4 to July 22, 1456. After the fall of Constantinople in 1453, the Ottoman sultan Mehmed II was rallying his resources in order to subjugate the Kingdom of Hungary. His immediate objective was the border fort (Hungarian végvár) of the town of Belgrade (in old Hungarian Nándorfehérvár). John Hunyadi, (known among the Serbs as “Sibinjanin Janko” – Ed note) a Hungarian nobleman and warlord, who had fought many battles against the Ottomans in the previous two decades, prepared the defense of the fortress.
The siege eventually escalated into a major battle, during which Hunyadi led a sudden counterattack that overran the Ottoman camp, ultimately compelling the wounded Sultan Mehmet II to lift the siege and retreat.
The Hungarians had, however, to pay dearly for this victory, as plague broke out in the camp, from which John Hunyadi himself died three weeks later (August 11, 1456). He was buried in the Cathedral of Gyulafehérvár (now Alba Iulia), the capital of Transylvania.
As the design of the fortress had proved its merits during the siege, some additional reinforcements were made by the Hungarians. The weaker eastern walls, where the Ottomans broke through into the upper town were reinforced by the Zindan gate and the Heavy Nebojsa tower. This was the last of the great modifications to the fortress until 1521 when Sultan Süleyman eventually captured it.
Pope Callixtus III ordered the bells of every European church to be rung every day at noon, as a call for believers to pray for the defenders of the city. The practice of Noon bell is traditionally attributed to the international conmemoration of the Belgrade victory and to the order of Pope Callixtus III.