Corporal Channing Day as "a star for the future" according to Lieutenant Colonel Phillip de Rouffignac, Commanding Officer, 3 Medical Regiment.
"Although only 25, she had recently been promoted to Corporal, and her current operational experience in Iraq and Afghanistan made her a natural choice for the demanding role she was undertaking in support of 40 Commando Royal Marines.
"Diligent in every respect of her preparation, she had worked hard all the way through the build-up training and led by example in all that she did.
“Hugely popular with her friends in Preston, Catterick and in Afghanistan, Corporal Channing Day made the most of everything and had lived a lifetime in a short time.
"An Army footballer, she was a real team player in every sense."
Tributes have been paid to Channing Day, a medic with 3 Medical Regiment, who was killed on patrol in Afghanistan on Wednesday.
It is still not clear exactly what happened. But a young woman is dead and a young Marine from 40 Commando has died beside her.