SEDD EL BAHR, TURKEY - APRIL 23:  Planes of the Turkish air force fly in formation past a Turkish flag at Helles Point, where Allied soldiers fought during the Gallipoli Campaign, during rehearsals for upcoming commemorative ceremonies on April 23, 2015 near Sedd el Bahr, Turkey. Allied and Turkish representatives, as well as family members of those who served, will commemorate the 100th anniversary of the campaign with ceremonies scheduled for April 24-25. The Gallipoli land campaign, in which a combined Allied force of British, French, Australian, New Zealand and Indian troops sought to occupy the Gallipoli peninsula and the strategic Dardanelles strait during World War I, began on April 25, 1915 against Turkish forces of the Ottoman Empire. The Allies, unable to advance more than a few kilometers, withdrew after eight months. The campaign cost the Allies approximately 45,000 killed and up to 200,000 wounded, the Ottomans approximately 85,000 killed and 160,000 wounded.  (Photo by Sean Gallup/Getty Images)