Serbian campaign (1915) Austro-Hungarian and Bulgarian occupation The Battle of Kaymakchalan was fought between Serbian and Bulgarian troops on the Macedonian front during World War I.

The battle was fought between 12 and 30 September 1916, when the Serbian army managed to capture the peak of Prophet Elijah while pushing the Bulgarians towards the town of Mariovo, where the latter formed new defensive lines.

Between 26 and 30 September, the peak changed hands several times until the Serbian army decisively captured it on the 30th.

[6] From a strategic standpoint, the battle was not a significant success for the Allies due to the upcoming winter that rendered further military engagements almost impossible.

Today, there is a small church on the peak of Prophet Elijah where the skulls of dead Serbian soldiers are stored, and it is regarded as a cultural site and is a tourist attraction.