Napoleon struck at Saint-Dizier, believing Field Marshal Gebhard Leberecht von Blücher's Allied army to be there. On 27 January, the French emperor found that he had missed the Prussian field marshal and directed his army southwest toward Brienne-le-Château in three columns. The Battle of Brienne was fought on 29 January. After some cavalry skirmishes, Napoleon ordered Guillaume Philibert Duhesme's division to attack Zakhar Dmitrievich Olsufiev's Russians in Brienne. Duhesme's first assault was repulsed. Napoleon ordered another attack with Decouz's division on Duhesme's right. At this point, Duhesme's division was forced back by a Russian cavalry charge and a French brigade under Louis Huguet-Chateau seized the château, nearly capturing Blücher. The Prussian field marshal ordered Fabian Wilhelm von Osten-Sacken's Russian corps to clear the French from Brienne and Olsufiev to retake the château. In the event, Olsufiev failed but Sacken succeeded after desperate fighting. Decouz was mortally wounded and his successor Admiral Pierre Baste was killed. Decouz was shot twice in the chest. The first wound occurred early in the battle but Decouz refused to leave the field. The second wound proved fatal. Pelet became the division's acting commander until 11 February.