The BBC has been given rare access to the military hospital at Selly Oak, Birmingham, and followed two gravely-injured servicemen from the Afghanistan frontline to treatment in the UK.
When we visit, the military-managed ward at Selly Oak hospital is spotless and humming with calm activity.
Almost every bed is occupied, several with soldiers who have suffered multiple amputations as well as severe burns or facial injuries. Some lie bandaged and motionless, while others chat or listen to the radio.
The hospital is currently looking after 31 military patients, including three servicewomen, most of them badly wounded in Helmand - the majority as the result of the Taliban's deadliest weapon, the improvised explosive device or IED.