In August, Ottoman forces established a provisional government of Western Thrace at Komotini to pressure Bulgaria to make peace. Bulgaria sent a three-man delegation — General Mihail Savov and the diplomats Andrei Toshev and Grigor Nachovich — to Constantinople to negotiate a peace on 6 September.^[92] The Ottoman delegation was led by Foreign Minister Mehmed Talat Bey, assisted by future Naval Minister Çürüksulu Mahmud Pasha and Halil Bey.

Resigned to losing Edirne, the Bulgarians played for Kırk Kilise (Lozengrad in Bulgarian). Bulgarian forces finally returned south of the Rhodopes in October. The Radoslavov government continued to negotiate with the Ottomans in the hopes of forming an alliance. These talks finally bore fruit in the Secret Bulgarian–Ottoman Treaty of August 1914.

As part of the Treaty of Constantinople, 46,764 Orthodox Bulgarians from Ottoman Thrace were exchanged for 48,570 Muslims (Turks, Pomaks, and Roma) from Bulgarian Thrace.^[94] After the exchange, according to the 1914 Ottoman census, there still remained 14,908 Bulgarians belonging to the Bulgarian Exarchate in Ottoman Empire.^[95]

On 14 November 1913 Greece and the Ottomans signed a treaty in Athens bringing to a formal end the hostilities between them. On 14 March 1914, Serbia signed a treaty in Constantinople, restoring relations with the Ottoman Empire and reaffirming the 1913 Treaty of London.^[92] No treaty between Montenegro and the Ottoman Empire was ever signed.