Vardar offensive

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The Vardar offensive (Bulgarian: Офанзива при Вардар) was a World War I military operation, fought between 15 and 29 September 1918. The operation took place during the final stage of the Balkan Front. On 15 September, a combined force of Serbian, French, and Greek troops attacked the Bulgarian-held trenches in Dobro Pole ("Good Field"), at the time part of the Bulgarian-occupied Kingdom of Serbia and the Kingdom of Greece (present-day North Macedonia and Greece). The assault and the preceding artillery preparation had devastating effects on Bulgarian morale, eventually leading to mass desertions. On 18 September, a second Entente formation assaulted the Bulgarian positions in the vicinity of Doiran Lake. Effectively employing machine gun and artillery fire the Bulgarians managed to stall the Allied advance on the Doiran sector. However the collapse of the front at Dobro Pole forced the Bulgarians to withdraw from Doiran. The Allies pursued the German 11th Army and the Bulgarian 1st Army...

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