...cavalry, had a sharp engagement with a party of rebel horsemen belonging to the command of General Imboden, at McConnellsburgh, Pa., defeating them and driving them out of the town.--(Doc. 85.) General Bragg abandoned his fortifications on the north side of Duck River, Tenn., and made a hasty retreat toward Tullahoma.--the rebels approached to a point on the Reistertown road seven miles from Baltimore, M...