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Australians and New Zealanders gathered for a dawn ceremony in Turkey to mark the 90th anniversary of World War I's disastrous Gallipoli campaign.

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Tens of thousands attended what is thought to be the largest ever gathering at the site.

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Many young people from the two countries were treating the journey to Gallipoli as a pilgrimage.

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For Australia and New Zealand, the bravery of their soldiers in the campaign is a source of national pride.

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Nearly 9,000 Australians were among the dead.

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Prince Charles recited Psalm 121 before the crowd sang hymns and said prayers for the dead.

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In Cyprus, British troops marked the occasion with the Australian comrades in the UN force

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In Sydney, Australia, crowds celebrated Anzac Day by greeting veterans from more recent conflicts.

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New Zealand's flag flew from Sydney Harbour Bridge for the first time.

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One veteran drew attention to an Anzac hero, Simpson, who carried wounded men from the front line on his donkey.

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Turkey held its own ceremony on Sunday to remember its dead.

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Turkey lost 87,000 men in the campaign, but refused to give ground.