World War I: Allied troops break through the Bulgarian defenses on the Macedonian front.

The Battle of Dobro Pole, also known as the Breakthrough at Dobro Pole, was a World War I battle fought between 15 and 18 September 1918. The battle was fought in the initial stage of the Vardar offensive, in the Balkan Front. On 15 September, a combined force of Serbian, French and Greek troops…