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
Thrace (theme) Krum (r. 803–814), Omurtag (r. 814–831), and Symeon (r. 893–927) the border moved by stages south of the Balkan mountains to roughly the line of the present Bulgarian frontier with Greece and Turkey. Thus, at around the start of the 10th century, the theme comprised essentially the eastern half of modern Eastern Thrace, although it extended north along the coast to include Anchialos. From the 11th century, Thrace and Macedonia appear to have been usually combined, as attested by numerous "strategoi" and judges ("kritai") holding jurisdiction over both themes. The name fell out of use as an administrative term in