The treaty of 6 July 1827, which the three Great Powers concluded and which was followed by the naval Battle of Navarino (8 October 1827), provided for the suspension of hostilities and the beginning of negotiations for the creation of an autonomous Greek state. The negotiations would cover the regions that were to make up the Greek state. However, there was great concern about this. At that time the revolutionary impetus had declined and its activity was practically restricted to certain parts of the Peloponnese and the islands of the Argosaronic gulf. Thus, the organization of campaigns and the recapturing of territories was decided upon so that the impetus would revive and legalize Greek territorial claims. Immediately after the sinking of the Egyptian fleet at Navarino an expedition to Chios was organized, thanks to pressure exerted by the refugees from Chios. This operation which lasted from October of 1827 until February 1828 and was led by the philhellene Fabvier was not crowned with success. At the same time a more successful expedition was organized in Crete. In a short period of time revolutionary centres were created and the Ottomans were largely restricted to the forts. However, an unfavourable diplomatic turn of events, from the Greek point of view, at the beginning of 1830 (Protocol of 3 February) actually eliminated the possibility of the integration of Crete within the Greek state. Moreover, the Egyptian forces which landed on Crete in September 1828 easily quelled all revolutionary actions on the island. The operation at Trikeri, situated at the entrance of the Pagasitikos Gulf in November 1827 was also unsuccessful.

Conversely, the expeditions in Rumeli were effective. The success of the campaigns relied upon coordination between the armatoles who had capitulated after the fall of Missolonghi (Spring of 1826) and the fall of the Acropolis a year later. Kapodistrias who had reached the Peloponnese at the beginning of 1828 was mobilized in this respect. Indeed, most chieftains had returned to the Greek side by taking part in the recapture of the districts of Rumeli and the negotiations for the surrender of the besieged in the Ottoman forts. The return of the powerful armatole of Xiromero, Varnakiotis, who contributed greatly to the capture of Missolonghi, as well as that of Andreas Iskos, the armatole at Valtos-Makrynoros, in a very important area as regards the Church in the Amvrakikos Gulf, was significant. These operations intensified from September of 1828 and resulted in the occupation of Vonitsa and Kravasara (Amphilochia) in the spring of 1829. Thus, the forts of west-central Greece were cut off from the military centres in Epirus and the fall of Naupaktos, Antirio, Missolonghi and Anatoliko (Aitoliko) in the spring of 1829 was facilitated. Finally, in east-central Greece, Dimitrios Ypsilantis took action from the end of 1828 and soon gained control of Boeotia, Parnasida and Lokrida. The most important battle - considered to be the last of the Greek Revolution - took place near Petra on 12 September and was a Greek victory. Four days later, in the course of negotiations with Ottoman officers, Ypsilantis achieved Ottoman withdrawal from east-central Greece south of Zeytun (Lamia), with the exception of Athens and the forts of Chalkis. These developments were a powerful negotiating argument for the Greeks in the discussion regarding the definition of boundaries in the Greek state.