The ‘Philikì Hetairía’ had decided to act, and the Peloponnesians responded enthusiastically to the signal. In the north Germanòs, metropolitan bishop of Patras, rallied the insurgents at the monastery of Megaspélaion, and unfurled the monastic altar-cloth as a national standard. In the south the peninsula of Maina, which had been the latest refuge of ancient Hellenism, was now the first to welcome the new, and to throw off the shadowy allegiance it had paid for a thousand years to Romaic archonts and Ottoman capitan-pashas. Led by Petros Mavromichalis, the chief of the leading clan, the Mainates issued from their mountains. This was in April, and by the middle of May all the open country had been swept clear, and the hosts joined hands before Tripolitza, which was the seat of Ottoman government at the central point of the province. The Turkish garrison attacked, but was heavily defeated at Valtetzi by the tactical skill of Theodore Kolokotrónis the ‘klepht’, who had become experienced in guerrilla warfare through his alternate professions of brigand and gendarme—a career that had increased its possibilities as the Ottoman system decayed. After Kolokotrónis’s victory, the Greeks kept Tripolitza under a close blockade. Early in October it fell amid frightful scenes of pillage and massacre, and Ottoman dominion in the Peloponnesos fell with it. On January 22, 1822, Korinth, the key to the isthmus, passed into the Greeks’ hands, and only four fortresses—Nauplia, Patras, Koron, and Modhon—still held out within it against Greek investment. Not a Turk survived in the Peloponnesos beyond their walls, for the slaughter at Tripolitza was only the most terrible instance of what happened wherever a Moslem colony was found. In Peloponnesos, at any rate, the revolution had been grimly successful. There had also been successes at sea. The merchant marine of the Greek islands had suffered grievously from the fall of Napoleon and the settlement at Vienna, which, by restoring normal conditions of trade, had destroyed their abnormal monopoly. The revolution offered new opportunities for profitable venture, and in April 1821 Hydhra, Spetza and Psarà hastened to send a privateering fleet to sea. As soon as the fleet crossed the Aegean, Samos rid itself of the Turks. At the beginning of June the rickety Ottoman squadron issued from the Dardanelles, but it was chased back by the islanders under the lee of Mitylini. Memories of Russian naval tactics in 1770 led the Psariots to experiment in fire-ships, and one of the two Turkish ships of the line fell a victim to this attack. Within a week of setting sail, the diminished Turkish squadron was back again in the Dardanelles, and the islanders were left with the command of the sea.