At war, transition to war, in attrocius weather conditions, in far from ideal environmental conditions, and with no hotel in sight - then this is when the officer earns his money.
So how do you explain the moustache wearing, Herefordshire based Sgt/Corporal who is i/c his 5/6 man patrol out for several weeks in desert/jungle/mountains (delete as appropriate)? Apples and pears in terms of role/skills etc., but the leadership, critical thinking, resiliance, maintenance of aim elements are very similar.