Napoleon won the Battle of Montereau on 18 February, resulting in 5,000 Allied casualties and capturing 15 artillery pieces. This induced Schwarzenberg to fall back on first Troyes and then farther east on 23 February. Marshal Nicolas Oudinot pursued with Kellermann's cavalry, including Jacquinot's division, while MacDonald led a second pursuing column. On 27 February, Napoleon left Oudinot and MacDonald to watch Schwarzenberg's army with 42,000 men and marched with 35,000 troops against Blücher, who was headed for Paris. Napoleon took with him Roussel's division and Sparre's brigade, which arrived from Spain at this time. Subsequently, Roussel's detached division fought at the battles of Craonne, Laon, Fère-Champenoise and Paris.