The Turk-Egyptian fleet, with 89 ships under the comand of a Turkish Pasha, Tachir, entered the Bay of Navarino, in order to reinforce and provide supplies to the land forces of Ibrahim, that were ruining the Peloponnese. The three European powers, Britain, France and Russia, in July 6, 1827 had agreed through the Treaty of London, to the creation of a semi-detached Greek state that would pay taxes to the the Sultan.
 
Although many Greek artillery commanders were disappointed with the agreements of the three powers, the revolutionary government accepted the treaty. Instead, the Sultan turned it down, considering that the Europeans were trying to impose conditions on his territory. In the Treaty of London, it was stated that if Pyli does not accept a mediation for the withdrawal from Moria, than the three allies will send consuls, which would lead to official recognition of the Greek state. Also, if the Turks rejected the truce then there would be sanctions.

In August 31, expired the period for acceptance of the Treaty by the Turks. Therefore, in October 12, 1827, the fleet arrived at the port of Pylos in order to impose the «appropriate measures» and to constrain Ibrahim to withdrawal, in accordance with the Treaty. In October 19, 1827, the fleet of the Europeans, the british flagship Asia and twelve ships under the vice admiral Kodrigkton, the Russian flagship Azof and eight ships under the sub admin Cheyden and the French flagship Seirin, seven ships under the sub admiral Derigny, entered the bay to exert more pressure and negotiate with the Turk-Egyptians. The naval battle began from a random and «minor» fact: during the consultations between the rival leaders, held in dinghies, that were comming and going from a flagship to another, Pierre Miquelon, the pilot of Asia, whose dutty was to perform the translations, was shot and killed. Petros Mikelis was accompanying an English officer, who directed a rescue boat to the Egyptian flagship Warrior for consulting. The naval battle, the last major naval clash done with sailing ships, lasted four hours and resulted in 60 Turk-Egyptian sank ships, and with them, the loss of 6000 sailors. During the conflict, the Turk-Egyptians were using heavy artillery from coastal Niokastro and southern Sfakteriza. From the allied fleet there was no sank ship while it is worth mentioning that the pilots of all three allies flagships, were Greeks.

It took Ibrahim about a year to eventually withdraw in September 23 1828, when the three powers sent in the Peloponnese a French expeditionary force under the command the Divari and Maikoi which took Koroni and Pylos and delivered them to the Greek guard commander Nikitaras. The French expeditionary forces remained for five years in the region and contributed to a great extend to the organization and infrastructure of the then newly established Greek state, assuring also that the Allied interests would be promoted to the East.

Each year on October 20, a celebration takes place for the anniversary of the naval battle with the participation of a frigate from each of the then allied fleet.