The Battle of Elli (Greek: Ναυμαχία της Έλλης, Turkish: İmroz Deniz Muharebesi) took place near the mouth of the Dardanelles on 16 December [O.S. 3 December] 1912 as part of the First Balkan War between the fleets of Greece and the Ottoman Empire. It was the largest sea battle of the Balkan Wars.