Injury: A non-artery-perforating shot to the area of the leg right above the knee with a standard issue Webley Mk IV revolver. The person shot is a man in his early twenties, a bit in need of some proper food and sleep but in otherwise decent health. He's been shot intentionally with precision and planning; it wasn't a wound that occurred on the battlefield itself.
Question: What kind of medical treatment, both immediate and non-immediate, will the victim receive? I've Googled every combination of bullet wound, field hospital, medical treatment, military emergency medicine, battlefield medical treatment and World War One I can think of and I have nothing to show for it except curiosity that Google always wants to correct my WWI search to a search for WWII. Does anyone know of a resource that can provide the sort of information I need?
Edited so I don't have to repeat myself:
He's a spy for Britain come over from the German lines.
He's being held by British soldiers who don't trust him. In order to make sure he doesn't get up to anything while a commanding officer is being brought to the scene, they shoot him in the leg. The shot misses all major arteries and goes through flesh only, not bone. He is sitting still and not resisting.
Thanks and never mind.