Western Thrace Montenegro) fought against the Ottoman Empire and annexed most of its European territory, including Thrace. Western Thrace was occupied by Bulgarian troops who defeated the Ottoman army. On November 15, 1912 on the right bank of the river Maritza Macedonian-Adrianopolitan Volunteer Corps captured the Turkish corps of Yaver Paha, which defends the Eastern Rhodopes and Western Thrace from invading Bulgarians. The victors quickly fell into dispute on how to divide the newly conquered lands, resulting in the Second Balkan War. In August 1913 Bulgaria was defeated, but gained Western Thrace under the terms of the Treaty of Bucharest. In the
Eastern Macedonia and Thrace Eastern Macedonia and Thrace Eastern Macedonia and Thrace () is one of the thirteen administrative regions of Greece. It consists of the northeastern parts of the country, comprising the eastern part of the region of Greek Macedonia along with the region of Western Thrace, and the islands of Thasos and Samothrace. The region of Eastern Macedonia and Thrace was established in the 1987 administrative reform as the Eastern Macedonia and Thrace Region (, "Periféria Anatolikís Makedonías kaí Thrákis"). With the 2010 Kallikratis plan, its powers and authority were redefined and extended, with the preexisting region in many respects inheriting status