The siege of Adrianople 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.^[44] A treaty was signed in London on 30 May. The city was reoccupied and retained by the Ottomans during the Second Balkan War.^[45]

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'. The Bulgarian army, after five months of siege and two bold night attacks, took the Ottoman stronghold.

The victors were under the overall command of Bulgarian General Nikola Ivanov while the commander of the Bulgarian forces on the eastern sector of the fortress was General Georgi Vazov, the brother of the famous Bulgarian writer Ivan Vazov and of General Vladimir Vazov.

The early use of an airplane for bombing took place during the siege; the Bulgarians dropped special hand grenades from one or more airplanes in an effort to cause panic among the Ottoman soldiers. Many young Bulgarian officers and professionals who took part in this decisive battle would later play important roles in Bulgarian politics, culture, commerce and industry.