Complex sentence: Otto however, was now reinforced with 3 squadrons of Austrian Hussars (one Archduke Ferdinand, two Karaczay) and two pieces of horse artillery, which bombarded the French and menaced their flank, forcing them to retreat once more.
Split into simpler sentences: Otto however, was now reinforced with three squadrons of Austrian Hussars, one from the "Archduke Ferdinand" and two from the "Karaczay" Regiments. Two pieces of Austrian horse artillery bombarded the French and menaced their flank, forcing them to retreat once more.