The plan of campaign was systematically carried out. During the season of respite the Greek islanders had harried the coasts and commerce of Anatolia and Syria at will. The first task was to deprive them of their outposts in the Aegean, and an advanced squadron of the Egyptian fleet accordingly destroyed the community of Kasos in June 1824, while the Ottoman squadron sallied out of the Dardanelles a month later and dealt out equal measure to Psarà. The two main flotillas then effected a junction off Rhodes; and, though the crippled Greek fleet still ventured pluckily to confront them, it could not prevent Ibrahim from casting anchor safely in Soudha Bay and landing his army to winter in Krete. In February 1825 he transferred these troops with equal impunity to the fortress of Modhon, which was still held for the sultan by an Ottoman garrison. The fire-ships of Hydhra came to harry his fleet too late, and on land the Greek forces were impotent against his trained soldiers. The Government in vain promoted Kolokotrónis from captivity to commandership-in-chief. The whole south-western half of Peloponnesos passed into Ibrahim’s hands, and in June 1825 he even penetrated as far as the mills of Lerna on the eastern coast, a few miles south of Argos itself. At the same time the Ottoman army of the west moved south again under a new commander, Rashid Pasha of Yannina, and laid final siege on April 27 to Mesolonghi, just a year after Byron had died of fever within its walls. The Greeks were magnificent in their defence of these frail mud-bastions, and they more than held their own in the amphibious warfare of the lagoons. The struggle was chequered by the continual coming and going of the Greek and Ottoman fleets. They were indeed the decisive factor; for without the supporting squadron Rashid would have found himself in the same straits as his predecessors at the approach of autumn, while the slackness of the islanders in keeping the sea allowed Mesolonghi to be isolated in January 1826. The rest was accomplished by the arrival of Ibrahim on the scene. His heavy batteries opened fire in February; his gunboats secured command of the lagoons, and forced Anatolikòn to capitulate in March. In April provisions in Mesolonghi itself gave out, and, scorning surrender, the garrison—men, women, and children together— made a general sortie on the night of April 22. Four thousand fell, three thousand were taken, and two thousand won through. It was a glorious end for Mesolonghi, but it left the enemy in possession of all north-western Greece.