The march, described as a "nation's thank you" to all those who fought in the First World War, saw descendants of veterans from across the country join together on Remembrance Sunday.
The march started in the Mall before turning into Whitehall, where about 10,000 people streamed past the Cenotaph memorial which looked over hundreds of poppy wreathes.
Wearing poppies and medals and carrying wreaths, hundreds gathered from 9am to mark 100 years since the guns fell silent.
Kate Nicholls spoke to Forces News on the march: "I'm remembering, principally, my great-grandfather - he died two weeks before the Armistice in Flanders.
"But also his brother, my great uncle, Tommy and his sister, Violet, who was a field nurse in World War One - both of who came through and survived.
"The generation who lived through World War Two and knew what the sacrifices had been in World War One, they're slowly dying out and unless we pass it onto the next generation and continue to tell their stories, the personal stories that make it real, then remembrance won't be as meaningful.
"We need to make sure it's a living and breathing act of remembrance."
World War One vintage buses were also on show at the procession, highlighting what both civilians and soldiers would have been transported in at the time.
The procession was helped by volunteers and big screens were erected so those waiting could view the Cenotaph service, and at 11am all fell silent.
Bells rang out to mark the celebration 100 years ago as the first marchers made their way to the memorial.
Lord Ashton of Hyde, Minister for WWI commemorations, said: "One of the biggest legacies is things like the battlefields...and heightening the sense that our ancestors did amazing things in the World War.
"There's practically not a community in this country that isn't linked some way (with WWI) and I think we've raised the awareness of that amongst young people."