Funny to think ,that when World War I came round, there were still veterans from the Crimean War and Indian Mutiny around and plenty of American Civil War vets were still going strong.
I think around 12% of British soldiers ,who served got killed in World War II. For British generals the fatality rate was round half that of common soldiers,around 6 % .Still,the British top brass had better chances of getting killed, than most American soldiers in World War 2 . The worst death rate was for British junior officers,who lead the charge over the over top .They were readily identifiable by their uniforms and a big fat target for German snipers and machine gunners. On the first day of the Somme I've read something like 60% of British officers were killed.