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Rh to the right and left, to crush in succession each of these weak armies, and the allies might then have marched irresistible and unresisted upon Paris. But at this crisis Dumouriez, the new commander-in-chief of the French, arrived at the camp near Sedan, and commenced a series of movements by which he reunited the dispersed and disorganized forces of his country, checked the Prussian columns at the very moment when the last obstacles to their triumph seemed to have given way, and finally rolled back the tide of invasion far across the enemy’s frontier.

The French fortresses had fallen; but nature herself still offered to brave and vigorous defenders of the land, the means of opposing a barrier to the progress of the allies. A ridge of broken ground, called the Argonne, extends from the vicinity of Sedan towards the south-west for about fifteen or sixteen leagues. The country of L'Argonne has now been cleared and drained; but in 1792 it was thickly wooded, and the lower portions of its unequal surface were filled with rivulets and marshes. It thus presented a natural barrier of from four or five leagues broad, which was absolutely impenetrable to an army, except by a few defiles, such as an inferior force might easily fortify and defend. Dumouriez succeeded in marching his army down from Sedan behind the