The situation was going from bad to worse. Ibrahim returned to Peloponnesos, and steadily pushed forward his front, ravaging as steadily as he went. Rashid, after pacifying the north-west, moved on to the north-eastern districts, where the national cause had been shaken by the final treachery and speedy assassination of Odhyssèvs. Siege was laid to Athens in June, and the Greek Government enlisted in vain the military experience of its Philhellenes. Fabvier held the Akropolis, but Generalissimo Sir Richard Church was heavily defeated in the spring of 1827 in an attempt to relieve him from the Attic coast; Grand Admiral Cochrane saw his fleet sail home for want of payment in advance, when he summoned it for review at Poros; and Karaiskakis, the Greek captain of Armatoli, was killed in a skirmish during his more successful efforts to harass Rashid’s communications by land. On June 5, 1827, the Greek garrison of the Akropolis marched out on terms. It looked as if the Greek effort after independence would be completely crushed, and as if Sultan Mahmud would succeed in getting his empire under control. In September 1826 he had rid it at last of the mischief at its centre by blowing up the janissaries in their barracks at Constantinople. Turkey seemed almost to have weathered the storm when she was suddenly overborne by further intervention on the other side. Tsar Alexander, the vaccillator, died in November 1825, and was succeeded by his son Nicholas I, as strong a character and as active a will as Sultan Mahmud himself. Nicholas approached the Greek question without any disinclination towards a Turkish war; and both Great Britain and France found an immediate interest in removing a ground of provocation which might lead to such a rude disturbance of the European ‘Balance of Power’. On July 6, 1827, a month after Athens surrendered, the three powers concluded a treaty for the pacification of Greece, in which they bound over both belligerent parties to accept an armistice under pain of military coercion. An allied squadron appeared off Navarino Bay to enforce this policy upon the Ottoman and Egyptian fleet which lay united there, and the intrusion of the allied admirals into the bay itself precipitated on October 20 a violent naval battle in which the Moslem flotilla was destroyed. The die was cast; and in April 1828 the Russian and Ottoman Governments drifted into a formal war, which brought Russian armies across the Danube as far as Adrianople, and set the Ottoman Empire at bay for the defence of its capital. Thanks to Mahmud’s reorganization, the empire did not succumb to this assault; but it had no more strength to spare for the subjugation of Greece. The Greeks had no longer to reckon with the sultan as a military factor; and in August 1828 they wore relieved of Ibrahim’s presence as well, by the disembarkation of 14,000 French troops in Peloponnesos to superintend the withdrawal of the Egyptian forces. In