The Gallipoli Campaign; also known as the Dardanelles Campaign or the Battle of Gallipoli or the Battle of 脟anakkale (Turkish: 脟anakkale Savasi); took place on the Gallipoli peninsula in the Ottoman Empire (now Gelibolu in modern day Turkey) between 25 April 1915 and 9 January 1916; during the First World War. A joint British and French operation was mounted to capture the Ottoman capital of Constantinople (Istanbul) and secure a sea route to Russia. The attempt failed; with heavy casualties on both sides. The campaign was considered one of the greatest victories of the Turks and was reflected on as a major failure by the Allies.

The Gallipoli campaign resonated profoundly among all nations involved. In Turkey; the battle is perceived as a defining moment in the history of the Turkish people鈥攁 final surge in the defence of the motherland as the ageing Ottoman Empire was crumbling. The struggle laid the grounds for the Turkish War of Independence and the foundation of the Republic of Turkey eight years later under Mustafa Kemal Atat眉rk; himself a commander at Gallipoli.

The campaign was the first major battle undertaken in the war by Australia and New Zealand; and is often considered to mark the birth of national consciousness in both of these countries.