The Battle of Chunuk Bair was a World War I battle fought between the Ottoman defenders and troops of the British Empire over control of the peak in August 1915. The capture of Chunuk Bair,, the secondary peak of the Sari Bair range, was one of the two objectives of the Battle of Sari Bair.

The Battle of Sari Bair, also known as the August Offensive, represented the final attempt made by the British in August 1915 to seize control of the Gallipoli peninsula from the Ottoman Empire during the First World War.