One of the heroes of the Peninsular War, in the opinion of my soldiers, was Army Surgeon James Guthrie. The article explains why the soldiers and officers had such a high opinion of him.
(The image at right is a mezzotint published by William Walker in 1853 of an earlier portrait by Henry Room.)
http://www.waterloo200.org/articles/surgeon-george-james-guthrie-wellingtons-combat-surgeon/
Despite the bad conditions under which they worked, Guthrie and his assistants had a very good recovery rate.
Susannah