Guidantonio Manfredi, generally known by the contemptuous abbreviation of Guidaccio, had been brought up at the court of Urbino, during his father's temporary banishment from his hereditary fief of Faenza, and had married a daughter of Count Guidantonio di Montefeltro. In the division of parties which we have just explained, both these feudatories adhered to the Milanese, but as their neighbour, the Lord of Rimini, was at first a partisan of the league, and as Bologna had but recently thrown off the papal authority, Filippo Maria considered it advisable to strengthen his forces in Romagna. Federigo was accordingly ordered to join his brother-in-law Guidaccio, and acquitted himself creditably in various skirmishes with the Tuscan troops, under Gianpaolo Orsini. The only personal incident preserved of this petty war is one to which he was in the habit of alluding, with something of the superstitious dread that pervades the good Sanzi's account of it, although its character was rather grotesque than horrible. Having marched from Faenza in bright moonlight, with a party of 400 horse on a foraging expedition, a noise like the clashing of arms was suddenly heard at a distance, which immediately being repeated close at hand, the troops, with fierce and terrified aspect, rushed on each other, and for about ten minutes fought and struggled pell-mell, while their frightened horses, partaking in the panic, neighed and bolted in all directions. Dawn discovered a scene of strange confusion; the infantry mounted, the cavalry on foot, many lying wounded on the ground, not a few horses killed, others with broken or disordered harness. This senseless alarm was never accounted for, and was consequently ascribed to diabolical influence.