Thier explains in some detail that it was important in N.'s view to make a slow organized retreat during daylight rather than a quick evacuation at night. The entire form and nature of the French Army's retreat from Leipzig was, by the design of N., to make it look as little as possible like the retreat of a defeated army.
So for that show, I cannot find another word, he is risking a large part of the army? For that show, he ignores beforhand the sound advise of some experienced officers?
An army leaving a battle field retreating - is defeated.
I have another conclusion, he didn't calculate defeat in a battle - but realizing the weakness of morale of his army - he did not dare to construct extra bridges - otherwise it might look defaitiste - this back fired.