A, behind the plateau of Mont-Saint-Jean, is the forest of Soignes.
As for the plain itself, let the reader picture to himself a vast undulating sweep of ground; each rise commands the next rise, and all the undulations mount towards Mont-Saint-Jean, and there end in the forest.
Two hostile troops on a field of battle are two wrestlers. It is a question of seizing the opponent round the waist. The one seeks to trip up the other. They clutch at everything: a bush is a point of support; an angle of the wall offers them a rest to the shoulder; for the lack of a hovel under whose cover they can draw up, a regiment yields its ground; an unevenness in the ground, a chance turn in the landscape, a cross-path encountered at the right moment, a grove, a ravine, can stay the heel of that colossus which is called an army, and prevent its retreat. He who quits the field is beaten; hence the necessity devolving on the responsible leader, of examining the most insignificant clump of trees, and of studying deeply the slightest relief in the ground.