Corporal Liam Riley was one of two soldiers from 3rd Battalion The Yorkshire Regiment killed by two roadside bombs in Afghanistan on February 1, 2010.
The men were serving as part of the 1 Coldstream Guards Battle Group.
Prince Harry was among the first to pay tribute to the 21-year-old, who was born in Sheffield.
They had served together at a military training unit in Canada in 2007.
The Prince described him as a "legend" and said it had been a "privilege" to work alongside Cpl Riley at the training unit in Canada.
"He was a legend," he said. "A really special man who got us all going and heading in the right direction.
"It is incredibly sad also to hear that Liam died alongside his friend, Lance Corporal Graham Shaw .
"My heart goes out to their loved ones, and to their many, many friends in their regiment and the wider Army."
Cpl Riley's family said: "Liam was a wonderful son who always wanted to join the Army from being very young. He loved Army-style stories as a little boy.
"When he was old enough to join he took to Army life like a duck to water.
"He was very conscientious with his Army work and didn’t want to disappoint anyone. We were very proud of him and what he achieved both in life and in his Army career.
"Liam liked sport and tried many different types – long enough to join or get the kit – but none lasted as long as football.
"This was his love and when he was at home he played for both Beighton Magpies and the Throstles and was a keen Sheffield Wednesday supporter even when he was away in Afghanistan.
"One of the things he asked when he rang home was how "Wednesday" were doing.
"He loved and respected his family and friends and was very close to his siblings Jonathan and Olivia.
"He was a bubbly, fun-loving lad and all his family and friends loved him – no-one will ever replace him."
Lieutenant Colonel Tom Vallings, Commanding Officer for 3 YORKS said: "Corporal Liam Riley volunteered at short notice to serve in Afghanistan such was his eagerness to do his duty.
"He was a strapping soldier from Sheffield and at only 21 years old had been identified as one of our stars of the future.
"He was an inspirational leader of men and was the youngest corporal in the Battalion.
"I have little doubt that he was heading to the top of his unique profession. He led by example, with boundless energy and an infectious smile that would spur his team on when life got tough.
"He was killed today by an IED in Helmand, whilst heroically returning fire to extract one of his team.
"He personified all the very best qualities of a Yorkshire soldier: brave, tough, honest and proud.
"Whilst we take great strength from Corporal Liam Riley's distinctive courage and example, his loss has hit us hard in 3 YORKS.
"Our thoughts and prayers are not only with his fellow soldiers who continue to rise to the challenges of Helmand, but also with his family and friends whose loss is immeasurable."
The deaths of Cpl Riley and L/Cpl Shaw brought the number of British military deaths since the Afghan campaign started in 2001 to 253.
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