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306 most resolute of his many adversaries, but also against the other masses that were slowly labouring up against his south-eastern frontiers. The triple chain of strong fortresses which the French possessed on the Belgian frontier, formed a curtain, behind which Napoleon was able to concentrate his army, and to conceal till the very last moment the precise line of attack which he intended to take. On the other hand, Blucher and Wellington were obliged to canton their troops along a line of open country of considerable length, so as to watch for the outbreak of Napoleon from whichever point of his chain of strongholds he should please to make it. Blucher, with his army, occupied the banks of the Sambre and the Meuse, from Liege on his left, to Charleroi on his right; and the Duke of Wellington covered Brussels; his cantonments being partly in front of that city, and between it and the French frontier; and partly on its west; their extreme right being at Courtray and Tournay, while their left approached Charleroi and communicated with the Prussian right. It was upon Charleroi that Napoleon resolved to level his attack, in hopes of severing the two allied armies from each other, and then pursuing his favourite tactic of assailing each separately with a superior force on the battle-field, though the aggregate