With the arrival of the Emperor, who brought significant reinforcements, Grouchy received orders to incessantly harass the enemy, in order to prevent Bennigsen from reinforcing his left wing, and also to try and silence the enemy guns that had started to pound the French left.
Grouchy received orders. This was with the arrival of the Emperor. This was to incessantly harass the enemy. This was to prevent Bennigsen from reinforcing his left wing, and also to try and silence the enemy guns that had started to pound the French left. The Emperor brought significant reinforcements.