The Roman and The Teuton by Charles Kingsley

I no not know whether any of you know much of the theory of war. I know very little myself. But something of it one is bound to know, as Professor of History. For, unfortunately, a large portion of the history of mankind is the history of war; and the historian, as a man who wants to know how things were done -- as distinct from the philosopher, the man who wants to know how things ought to have been done -- ought to know a little of the first of human arts -- the art of killing. What little I know thereof I shall employ to-day, in explaining to you the invasion of the Teutons, from a so-called mechanical point of view. I wish to shew you how it was possible for so small and uncivilized a people to conquer one so vast and so civilized; and what circumstances (which you may attribute to what cause you will: but I to God) enabled our race to conquer in the most vast and important campaign the world has ever seen.

I call it a campaign rather than a war. Though it lasted 200 years and more, it seems to me (it will, I think, seem to you) if you look at the maps, as but one campaign: I had almost said, one battle. There is but one problem to be solved; and therefore the operations of our race take a sort of unity. The question is, how to take Rome, and keep it, by destroying the Roman Empire.