 Complete the following phrase:  Charles John, as the Commander-in-Chief of the Northern Army, successfully defended the approaches to Berlin and was victorious in battle against Oudinot in August and against Ney in September at the Battles of Großbeeren and Dennewitz. Bernadottes Army of the North would continue to guard Berlin and keep watch on Davouts forces in Hamburg while the Allies, in accordance with the plan conceived at Trachenberg, maneuvered toward Napoleons army at Leipzig. With the other Allied armies engaged in battle on 17 October, Bernadottes army finally crossed the Elbe and joined in the 