In 2007, former Grenadier Guards officer, Capt Alexander Allan, completed a six-month deployment to Helmand province in Afghanistan - photographing many of his experiences while he was there.
The remarkable images, offering a unique insight into life on patrol and in camp, have now been published in a book - Afghanistan: A Tour of Duty - with all profits going to The British Limbless Ex Servicemen Association.
Take a look at Capt Allan's photographs, as he describes what it was like on the front line.
This slideshow contains graphic images.
Music courtesy KPM Music. All photographs courtesy Alexander Allan.
Slideshow production by Paul Kerley. Publication date 17 February 2010.
The BBC is not responsible for the content of external internet sites
More audio slideshows