Complex sentence: Furthermore, Napoleon argued, Jourdan had retreated north-northwest, to the Black Forest to protect Alsace, instead of swinging south, to join with Andre Massena's well-positioned Army of Helvetia.
Split into simpler sentences: Furthermore, Napoleon argued, Jourdan had retreated north-northwest, to the Black Forest to protect Alsace. He should have retreated south, to join with Andre Massena's well-positioned Army of Helvetia.