Early in July, the Ottoman fleet arrived off the Barbary coast. Tunis offered as little resistance to the arms of the Moslems as it had before done to those of the Christians. That city had been so often transferred from one master to another, that it seemed almost a matter of indifference to the inhabitants to whom it belonged. But the Turks found it a more difficult matter to reduce the castle of the Goletta and the fort raised by the brave engineer Cerbelloni, now well advanced, though not entirely completed. It was not till the middle of September, after an incredible waste of life on the part of the assailants, and the extermination of nearly the whole of the Spanish garrisons, that both the fortresses surrendered.[365] [Sidenote: DON JOHN ON A MISSION TO GENOA.] No sooner was he in possession of them, than the Turkish commander did that which Philip had in vain wished his brother to do. He razed to the ground the fortress of the Goletta. Thus ended the campaign, in which Spain, besides her recent conquests, saw herself stripped of the strong castle which had defied every assault of the Moslems since the time of Charles the Fifth. One may naturally ask, Where was John of Austria all this time? He had not been idle, nor had he remained an indifferent spectator of the loss of the place he had so gallantly won for Spain. But when he first received tidings of the presence of a Turkish fleet before Tunis, he was absent on a mission to Genoa, or rather to its neighbourhood. That republic was at this time torn by factions so fierce, that it was on the brink of a civil war. The mischief threatened to extend even more widely, as the neighbouring powers, especially France and Savoy, prepared to take part in the quarrel, in hopes of establishing their own authority in the state. At length Philip, who had inherited from his father the somewhat ill-defined title of "Protector of Genoa," was compelled to interpose in the dispute. It was on this mission that Don John was sent, to watch more nearly the rival factions. It was not till after this domestic broil had lasted for several months, that the prudent policy of the Spanish monarch succeeded in reconciling the hostile parties, and thus securing the republic from the horrors of a civil war. He reaped the good fruits of his temperate conduct in the maintenance of his own authority in the counsels of the republic; thus binding to himself an ally whose navy, in time of war, served greatly to strengthen his maritime resources.[366]