How many great soldiers have learnt their trade on the staff or at the side of another great (or even pretty good) soldier? How many haven't? I've always been a bit sceptical of the criticism that X didn't train up any of his juniors in his skills. X can be just about any great general - Napoleon and Wellington for starters. Almost the only example of the baton being passed from one generation to the next that springs to my mind is Philip of Macedon and Alexander the Great, though I'm sure that a hundred other examples will be produced which will leave my scepticism in tatters!