 Complete the following phrase:  In September 1812, Bronnitsy and Bogorodsk became the farthest points reached by the French troops in Napoleons invasion of Russia. After the surrender of Moscow on September 14, the main Russian Army retreated south-east along the Ryazan road, cautiously shadowed by Murats cavalry. On September 17 Kutuzov made a sharp westward turn to Podolsk; a small task force continued movement to Ryazan, impersonating the whole army. Murat missed Kutuzovs turn and did not discover the deception until he reached Bronnitsy. Although by September 21 Napoleon suspected the Russian maneuver, the French lost the track of the Russian Army for two days and waged a wide pursuit that culminated in the 