Siege of Jajce
1464 CE.
Shown on the map at 44.340°, 17.269°.
The siege of Jajce took place between 10 July and 22 August 1464, during the Ottoman conquest of Bosnia and Herzegovina, when an Ottoman army under Sultan Mehmed II made a new attempt to conquer Bosnia and take control of the strategic fortress of Jajce, south of Banja Luka, at the time under Hungarian control. Despite massive bombardment, the final Ottoman assault was heavily repulsed and after hearing that King Mathias of Hungary was approaching with a relief army, Mehmed abandoned the siege.
Text from the Wikipedia article Siege of Jajce (1464), licensed CC BY-SA 4.0.