The French expected little resistance from the usurpers. But republican resolve was stiffened by the charismatic Giuseppe Garibaldi's long-delayed triumphal entry into Rome at last, on 27 April, and by the arrival on 29 April of the Lombard Bersaglieri, who had recently driven the Austrians from the streets of Milan with new tactics of house-to-house fighting. Hasty defenses were erected on the Janiculum wall, and the villas on the city's outskirts were garrisoned. On 30 April, Oudinot's out-of-date maps led him to march to a gate that had been walled up some time before. The first cannon-shot was mistaken for the noon-day gun, and the astonished French were beaten back by the fiercely anti-clerical Romans of Trastevere, Garibaldi's legionaries and citizen-soldiers, who sent them back to the sea. But despite Garibaldi's urging, Mazzini was loath to follow up their advantage, as he had not expected an attack by the French and hoped that the Roman Republic could befriend the French Republic. The French prisoners were treated as "ospiti della guerra" and sent back with republican tracts citing the Article V of the most recent French constitution: "France respects foreign nationalities. Her might will never be employed against the liberty of any people".