The Six Days Campaign (10–15 February 1814) was a final series of victories by the forces of Napoleon I of France as the Sixth Coalition closed in on Paris. The Six Days Campaign was fought from 10 February to 15 February during which time Napoleon inflicted four defeats on Blücher's Army of Silesia in the Battle of Champaubert, the Battle of Montmirail, the Battle of Château-Thierry, and the Battle of Vauchamps. Napoleon's 30,000-man army managed to inflict 17,750 casualties on Blücher's force of 50,000–56,000. The advance of the Army of Bohemia under Prince Schwarzenberg toward Paris compelled Napoleon to abandon his pursuit of Blücher's army, which, though badly beaten, was soon replenished by the arrival of reinforcements. Five days after the defeat at Vauchamps, the Army of Silesia was back on the offensive. Strategic situation By the start of 1814 the Sixth Coalition had defeated the French both in Germany (see German Campaign of 1813 ) and in Spain (see Peninsular War § End of the war in Spain), and were poised to invade France from the north-east and south-west. On the north-eastern front three Coalition armies were preparing to invade France, however by the time that Six Days' Campaign ended only two armies had crossed the frontier into France: The Army of Bohemia or the Grand Army, with 200,000–210,000 Austrian, Russian, Bavarian, and Wurttemberg soldiers under Prince Schwarzenberg, passed through Swiss territory (violating the cantons' neutrality) and crossed the Rhine between Basel and Schafhausen on 20 December 1813. The Army of Silesia, with 50,000–56,000 Prussians and Russians under Prince Blücher, crossed the Rhine between Rastadt and Koblenz on 1 January 1814. At the same time Wellington invaded France over the Pyrenees. Leaving Marshals Soult and Suchet to defend south-west France, Napoleon commanded the French resistance in north-east France. Napoleon had about 200,000 men in all, of whom upwards of 100,000 were held by the Duke of Wellington on the Spanish frontier (see Invasion of south-west France), and 20,000 more were required to watch the debouches from the Alps. Hence less than 80,000 remained available for the east and north-eastern frontier. If, however, he was weak in numbers, he was now operating in a friendly country, able to find food almost everywhere and had easy lines of communication. Prelude The fighting in north-east France was indecisive during January and the first week of February. During the Battle of Brienne (29