On 2nd March 1807, colonel Boudinhon-Valdec of the French 4th hussars was taken prisoner while leading a reconnoitring patrol of 2 officers, 1 trumpeter, 14 hussars and 40 infantrymen.

Pointing to his trumpeter, he claimed to have had come under a flag of truce with verbal errand, this was comfirmed shortly afterwards verbally and in written form by his commander, general Dupont.

However, that he had come with a detachment of mixed arms, on a remote hidden way, trying to cross the thin ice of the river Passarge, instead of taking the direct road between the two headquarters (which had a bridge), and that his infantry after runnig away first, gave fire on the Prussian detachment which had surprised the French hussars leading at the head, was interpreted to his disadvantage. So he was treated as a prisoner.