Delrisen naturally got it wrong. The Guard Corps sent to intercept only consisted of 14,000 men, and they had been avoiding villages all along, so nobody noticed them at all.
Even if the Prussians had detected something anomalous, by the time it would have been reported to him, the Guard Corps would have already been upon them.
When Joseph learned that there was a large-scale movement in the Prussian Army, he knew they were definitely heading towards Ratibor. It could be said that, with the rapid marching speed of the Guard Corps, the ambush was almost guaranteed to be successful.
This is the advantage of encirclement tactics—you know the enemy's reinforcements must take a certain path, so you can launch targeted attacks on the reinforcing troops.
Soon, a straight white line of infantry appeared in the Prussian soldiers' line of sight, accompanied by the orderly sound of military drums, it slowly advanced towards them.
