 Complete the following phrase:  In 1812 during the French invasion of Russia, Joseph Napoleons Regiment was deployed for combat. The 2nd and 3rd battalions formed part of Marshal Davouts I Corps while the 1st and 4th battalions formed part of Prince Eugenes IV Corps. In the 1812 campaign Joseph Napoleons Regiment fought at Shevardino, forming squares and protected a French infantry regiment that had been attacked and disorganized by Russian cavalry from further cavalry attacks. At the Battle of Borodino all four battalions of Joseph Napoleons Regiment were present, the 3rd and 4th battalions participated in fighting for the great redoubt that dominated the battlefield at Borondino. Joseph Napoleons Regiment fought during the French retreat from Russia at 