The Greek revolt expanded, won at sea, and fractured within

The revolt spread through the Peloponnese, Crete, Macedonia, and central Greece, although several of those regional risings were later suppressed. Theodoros Kolokotronis's forces captured Tripolitsa in 1821, giving the movement an important early success. A makeshift Greek fleet also interfered with Ottoman reinforcements in the Aegean. Those gains were undercut when Greek factions fought civil wars among themselves, leaving the revolution vulnerable to a more disciplined external intervention.