The Army of the North remained fairly static whilst Blücher advanced into France on the northern flank and Schwarzenberg on the southern. Napoleon defeated Blücher's advance in the Six Days' Campaign of 10–15 February, forcing the Prussians to withdraw, before he was compelled to deal with the Austrian forces. He defeated the Austrians at the 18 February Battle of Montereau on 18 February after which they withdrew to Troyes.