Video: 'World War I: Gallipoli Campaign' (4 videos)

(Sunday, January 9, 1916, during the Gallipoli Campaign, part of the Middle Eastern theatre of World War I) — Allied forces today completed a full retreat from the shores of the Gallipoli peninsula in Turkey, ending a disastrous invasion of the Ottoman Empire.

The Gallipoli Campaign resulted in 250,000 Allied casualties and greatly discredited Allied military command. Roughly an equal number of Turks were killed or wounded.