The volunteer armies were therefore keen to fight so they could secure a safe passage for allied navies.
But the plan backed by Winston Churchill, then first lord of the admiralty, was flawed and the campaign, which faced a heroic defence by the Turks, led to stalemate and withdrawal eight months later.
Television footage showed veterans and their families marching by flag-waving crowds and laying wreaths at war memorials in Sydney and other Australian cities.
"At this hour, on this day, ANZAC received its baptism of fire and became one of the immortal names in history".
Why is Anzac Day important?
"This year, gladly, for the first time ever I will be marching in Milton", he proudly said.
"On ANZAC Day we honour those who have lost their lives, we honour those who were injured, we honour those who came back haunted, those at home who lost loved ones, and all who suffered", he says.
How is it celebrated?
The day was named a national holiday in Australia and New Zealand in the 1920s, and is now seen as an occasion to remember all Australians and New Zealanders who have died in service.
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Hundreds of thousands of Australians flocked to ceremonies held across the country in honor of those who died in war on Australia's national day of remembrance, Anzac Day, on Tuesday, while Prime Minister Malcolm Turnbull paid a secret visit to Australian troops stationed in Iraq and Afghanistan.
"There's a lot of young people coming now and it's good that they learn what happened during the war", said 100-year-old former POW Harold Martin.
Veterans will also march in parades across the country, while other Anzac services will be held around the world.
In Australia, football is often played on Anzac day to remember how soldiers would play the game to keep their spirits up. It could even be said that, 103 years later, the Anzacs are still unifying Australians through their service and sacrifice.
During the war, friends and families of soldiers would send care packages overseas - and they created a biscuit made of rolled oats, sugar, flour, coconut and butter, as this recipe was least likely to spoil during the journey.
"But, personally I like to look at Anzac Day as a day to celebrate Australia".
The location is as per previous services, at the Lions Memorial Park at the corner of Medowie and Ferodale Roads.
The High Commissioner of New Zealand Sir Jerry Mateparae, his Australian counterpart Alexander Downer and the chief of the defence staff, Air Chief Marshall Sir Stuart Peach, also laid wreaths.
At 12pm, there will be a Service of Commemoration and Thanksgiving, which will last around an hour.