Battle of Adrianople
1912 CE.
Shown on the map at 41.674°, 26.561°.
The siege of Adrianople (Bulgarian: oбсада на Одрин, obsada na Odrin; Serbian: oпсада Једрена, opsada Jedrena; Turkish: Edirne kuşatması), was fought during the First Balkan War. The siege began on 3 November 1912 and ended on 26 March 1913 with the capture of Edirne (Adrianople) by the Bulgarian 2nd Army and the Serbian 2nd Army. The loss of Edirne delivered the final decisive blow to the Ottoman army and brought the First Balkan War to an end. A treaty was signed in London on 30 May. The city was reoccupied and retained by the Ottomans during the Second Balkan War. The victorious end of the siege was considered to be an enormous military success because the city's defenses had been carefully developed by leading German siege experts and called 'undefeatable'.
Text from the Wikipedia article Siege of Adrianople (1912–1913), licensed CC BY-SA 4.0.