By 1917, thanks to the new munitions factories and the women that worked in them, the British Empire was supplying more than 50 million shells a year.
Ever since World War I, superior force is no longer measured in terms of men or horses, but in the means to wreak destruction.
The people who read the history books tend to have a natural zeal and are alarmingly well-read.
It is not enough just to get your forces from A to B - you have to keep them fed and watered as they go. The art of movement, therefore, is one of the most complex and vital that any commander must master if he is going to win.
History tells us that a general can move and feed an army as efficiently as he likes, but the real litmus test is the battlefield.
It is surely no coincidence that Napoleon's two greatest heroes were Alexander the Great and Julius Caesar. In certain respects, he would outdo them both.
