Families of soldiers who served in the Gallipoli campaign of World War I, along with world leaders, streamed onto the battle sites in Turkey on Friday for ceremonies marking 100 years since the British-led invasion.
The family of Australian Sgt. D. M. Williamson, killed May 3, 1915, placed tributes on his grave in Turkey's Shrapnel Valley cemetery, April 23, 2015. Nearly 700 Allied servicemen killed during the Gallipoli campaign are buried there.
Britain's Prince Charles, center, and Prince Harry, right, visit Turkey's Cape Helles British Memorial before a ceremony marking the Battle of Gallipoli's 100th anniversary, April 24, 2015.
A memorial in the Turkish coastal town of Eceabat in Gallipoli peninsula pays tribute to the doomed Allied offensive to secure a naval route from the Mediterranean to Istanbul, April 23, 2015.
Poppies decorate a commemorating wall with the names of fallen servicemen at the Lone Pine cemetery and memorial site in Gallipoli peninsula, Turkey, April 23, 2015.