Complex sentence: Disputes soon broke out between Hohenlohe and the commander-in-chief, the duke of Brunswick, the armies marched back and forth without effective results, and finally Hohenlohe's army was almost destroyed by Napoleon at Jena (see Napoleonic Campaigns).
Split into simpler sentences: Disputes soon broke out between Hohenlohe and the commander-in-chief, the duke of Brunswick. As a result, the armies marched back and forth without effective results, and finally Hohenlohe's army was almost destroyed by Napoleon at Jena (see Napoleonic Campaigns).