Map showing the territorial gains (darker shades) of Romania, Bulgaria, Serbia, Montenegro, and Greece, primarily at the expense of Turkey, agreed in the Treaty of Bucharest following the Second Balkan War. Despite its gains, Bulgaria also lost territory to both Romania and Turkey.
The Balkan States According to the Treaty of Bucharest; Acquisitions of New Territory shown by darker shades
"To the Bulgarian army and nation, December 12, 1915, will always be a memorable date. On that day our army occupied the last three Macedonian towns still in the enemy's hands—Doiran, Guevgheli and Sturga. The last combats with the French, English and Serbians took place on the shores of Lake Doiran and near Ochrida. The enemy has been driven back at all points: Macedonia is free; there is not a single enemy soldier on her soil."
December 12, 1915 communiqué of the Bulgarian General Staff quoted in the entry for the following day from the memoirs of Maurice Paléologue, French Ambassador to Russia. Bulgaria had cast off its neutrality by invading Serbia with one army and sending a second to prevent Allied (primarily French) troops trying to advance from Greece to aid Serbia.
An Ambassador's Memoirs Vol. II by Maurice Paléologue, page 125, publisher: George H. Doran Company
1915-12-12, 1915, December, Macedonia, Lake Doiran
