 Complete the following phrase:  In March 1814, Berckheim took command of an 1,807-strong cavalry division consisting of two brigades under Jean Nicolas Curely and Pierre Mourier. Curelys brigade was made up of the 1st 406, 2nd 492 and 3rd 179 Provisional Regiments of Hussars, Chasseurs à Cheval and Lancers. Mouriers brigade included the 1st Provisional Regiment 501 of cuirassiers and carabineers and the 2nd Provisional Regiment 229 of dragoons. On 14 March, the new division arrived in the field with Napoleons army. On 19 March Napoleon personally accompanied two French cavalry divisions from Plancy-lAbbaye to Méry-sur-Seine. Evidently, these were the divisions of Berckheim and Louis-Michel Letort de Lorville because the next day Letort was recalled to Arcis-sur-Aube with a pontoon bridge that had been captured. In a skirmish with Allied cavalry the following afternoon, Letorts division was driven back to Méry despite the assistance of Curelys brigade. That night, Letort set out again, leaving the pontoons with Berckheim. On 21 March, Berckheims division joined the main army at Arcis. These actions were part of the 