It was one of the most horrific disasters of the First World War, which still haunts the descendants of those who died. Yesterday, as commemorations were held all over the world to mark the 100th anniversary of the Gallipoli campaign, the Royal Family led tributes to those who fought and fell in the ill-fated offensive. The day began in London with a dawn ceremony at Wellington Arch on Hyde Park Corner, attended by Princess Anne. Later the Queen, joined by the Duke of Edinburgh, Prince William and political leaders, led the nation during a ceremony at the Cenotaph in Whitehall, while Prince Charles was in Turkey with Prince Harry. Princes Charles and Harry chat during a visit to The Nek, a narrow stretch of ridge on the Anzac battlefield . Prince Harry stops for a photo with a fan during the royal visit to Turkey yesterday . The pair looked sombre during the New Zealand Memorial Service, held at Chunuk Bair, Turkey . Prince Harry greets the large New Zealand crowds at a service marking the country's involvement in the doomed Gallipoli campaign, alongside conservative New Zealand Tukituki MP Craig Foss (left) Afterwards the Queen joined a service of remembrance at Westminster Abbey, where she laid a wreath at the Grave Of The Unknown Warrior. The national flags of Australia, New Zealand, Turkey and the UK were carried through the Abbey and placed close to the high altar as a sign of reconciliation between old enemies. Earlier, Charles and Harry joined more than 10,000 people in a dawn pilgrimage at Gallipoli to honour the bravery of the Allied troops who stormed the peninsula's beaches in 1915. The landings were supposed to be a decisive blow that would knock the Turks out of the war. But eight months of bloody fighting later, after an estimated 145,000 lives on both sides had been lost, the Allies pulled out, having failed in their objective. Around 58,000 Allied troops were killed, many from Australia and New Zealand. Almost 36,000 Commonwealth servicemen are buried or commemorated on Gallipoli. Prince Charles gave a moving reading about troops weeping as they left their dead comrades behind when they left Gallipoli. He read the words of a soldier, who wrote: 'The hardest feature of the evacuation was in leaving those dead comrades behind. They had bequeathed us a sacred trust.' Yesterday Prince Charles gave a moving reading about troops weeping as they left their dead comrades behind when they left Gallipoli . Prince Charles walks hand in hand with Turgut Kacmaz, the son of Turkey's oldest Gallipoli veteran . Turkey's EU Minister Volkan Bozkir walks and talks with Prince Charles . We will remember them: Retired Australian army Major John Titley at the Wellington Arch commemoration . Queen Elizabeth and The Duke of Edinburgh attend a commemoration service at Westminster Abbey . The pair were joined by Prince William, who remained in London awaiting the birth of his second child . The Queen and Prince William take a seat at Westminster Abbey . The Gallipoli landings were supposed to be a decisive blow that would knock the Turks out of the war . Yesterday the Queen joined a service of remembrance at Westminster Abbey, where she laid a wreath at the Grave Of The Unknown Warrior.  Pictured right is a 1915 image of a British solider paying his respects at the grave of a comrade near Cape Helles .
Yesterday the Royal Family led tributes to those who fought at Gallipoli .
The day began in London with a dawn ceremony and service at Whitehall .
The Queen, the Duke of Edinburgh and Prince William all attended .
Prince Charles and Prince Harry led the tributes in Turkey, where they were joined by thousands of people and leaders from Commonwealth nations .