world leaders were joined by princes charles and harry on royal navy 's flagship hms bulwark in turkey 's dardanelles straits to mark centenary of the catastrophic landings which claimed 140,000 lives during world war one .
an estimated 1,000 allied soldiers died on the first day of the disastrous invasion until january 1916 , when after huge losses on both sides , the allies successfully fooled the turkish forces and evacuated their soldiers from the peninsula .
historian stephen chambers has collected more than 100 rare photographs , many taken by the troops themselves , including poignant images of soldiers .