Took place against the Ottoman Empire during the First World War

The naval operations in the Dardanelles campaign took place against the Ottoman Empire during the First World War. Ships of the Royal Navy, French Marine nationale, Imperial Russian Navy and the Royal Australian Navy, attempted to force a passage through the Dardanelles Straits, a narrow, 41-mile-long (66 km) waterway connecting the Mediterranean Sea with the Sea of Marmara and the Black Sea further north.