THREE: Deceptive Measures of Frederick.Plans for the Invasion of Silesia.Avowed Reasons for the Invasion.The Ball in Berlin.The March of the Army.Hardships and Successes.Letter to Voltaire.Capture of Glogau.Capture of Brieg.Bombardment of Neisse.But General Neipperg, the Austrian commander-in-chief, proved as watchful, enterprising, and energetic as Frederick.248 His scouting bands swarmed in all directions. The Prussian foraging parties were cut off, their reconnoitrers were driven back, and all the movements of the main body of the Austrian army were veiled from their view. General Neipperg, hearing of the fall of Glogau, decided, notwithstanding the inclemency of the weather and the snow, to march immediately, with thirty thousand men, to the relief of Neisse. His path led through mountain defiles, over whose steep and icy roads his heavy guns and lumbering ammunition-wagons were with difficulty drawn.