Siege of Bursa
1317 CE.
Shown on the map at 40.183°, 29.067°.
The Siege of Bursa (Ottoman Turkish: فتحِ بورصه, romanized: Feth-i Bursa) took place from 1317 until the capture of Bursa on 6 April 1326, when the Ottoman Turks deployed a bold plan to seize the city, which was back then known as Prusa. The Ottomans had not captured a city before; the lack of expertise and adequate siege equipment at this stage of the war meant that the city fell only after six or nine years. The historian, Laonikos Chalkokondyles, notes that the Ottomans took advantage of the Byzantine civil war of 1321–1328 to capture the city: "Andronikos decided that he should hold the throne himself, as his grandfather had already grown old, and so they fell out with each other. He was too stubborn to submit and caused endless trouble. He brought in the Serbs and allied himself with the leading Greeks in his struggle for the throne. As a result they could do nothing to prevent the Turks from crossing over into Europe.
Text from the Wikipedia article Siege of Bursa, licensed CC BY-SA 4.0.