 Complete the following phrase:  They had to put aside their differences during the French invasion of Russia, when Morands division formed part of Davouts renumbered I Corps. Crossing the Niemen on 24 June 1812, he fought at Smolensk and had his jaw smashed by a shell splinter at the Battle of Borodino. He continued to lead his division in the retreat from Moscow, being one of the last formations to leave the city. Fighting at Vyazma and 