australian prime minister tony abbott , his new zealand counterpart john key , prince charles and prince harry are among those in attendance .
defence force chief mark binskin told the thousands gathered there of the horror the anzacs were confronted with on the day they came ashore in turkey a century ago .
as dawn broke , families of soldiers , leaders and visitors gathered near former battlefields , honoring thousands of australians and new zealanders who fought in the world war i gallipoli campaign .