By the end of the month , the Peloponnese was in open revolt against the Ottomans and by October 1821 the Greeks under Theodoros Kolokotronis had captured Tripolitsa . The Peloponnesian revolt was quickly followed by revolts in Crete , Macedonia and Central Greece , which would soon be suppressed . Meanwhile , the makeshift Greek navy was achieving success against the Ottoman navy in the Aegean Sea and prevented Ottoman reinforcements from arriving by sea . In 1822 and 1824 the Turks and Egyptians ravaged the islands , including Chios and Psara , committing wholesale massacres of the population . Approximately three-quarters of the Chios ' Greek population of 120,000 were killed , enslaved or died of disease . This had the effect of galvanizing public opinion in western Europe in favor of the Greek rebels
killed , enslaved
Chios massacre
Greece