The white Gurkhas : the 2nd Australian Infantry Brigade at Krithia, Gallipoli

The Dardanelles, a narrow 60-mile-long strip of water that divides Europe from Asia, has been of great strategic significance for centuries. Carefully secured by international treaty, it was the closing of the Dardanelles that eventually brought the Ottoman Empire into the war as a German ally at the end of October 1914.

Gallipoli has become a defining moment in the history of both Australia and New Zealand, revealing characteristics that both countries have used to define their soldiers: endurance, determination, initiative and 'mateship'. Here are 20 remarkable photos from Gallipoli.

From the largest naval battle, and the longest battle, to the most painful and infamous battle, and the battle that marked the end of mobile warfare on the Western Front, discover 10 significant battles of the First World War that took place between 1914-1918.