Serbian and Montenegrin front Greek front The Battle of Kaliakra, usually known as the Attack of the Drazki (Bulgarian: Атаката на Дръзки) in Bulgaria, was a maritime action between four Bulgarian torpedo boats and the Ottoman cruiser Hamidiye in the Black Sea.

During the course of the First Balkan War, the Ottoman Empire's supplies were dangerously limited after the battles in Kirk Kilisse and Lule Burgas and the sea route from the Romanian port Constanţa to Istanbul became vital for the Ottomans.

The Ottoman navy also imposed a blockade on the Bulgarian coast and on 15 October, the commander of the cruiser Hamidiye threatened to destroy Varna and Balchik, unless the two towns surrendered.

On 21 November an Ottoman convoy was attacked by the four Bulgarian torpedo boats Drazki (Bold), Letyashti (Flying), Smeli (Brave) and Strogi (Strict).

However, Hamidiye was not sunk, due to her well-trained crew, strong forward bulkheads, the functionality of all her water pumps and a very calm sea.