But the next year there was another rising all over Greece.  The peasants of Attica drove the Turkish garrison out of all Athens but the Acropolis; the Suliots rose again, with secret encouragement from Ali Pasha, and hope seemed coming back.  But when Omar Pasha had been sent from Constantinople with 4000 Turkish troops, he found it only too easy to rout 700 Greeks at Thermopylæ, and, advancing into Attica, he drove back the peasants, and relieved the Turkish garrison in the Acropolis, which had been besieged for eighty-three days; but no sooner had he left the place than the brave peasants returned to the siege.