The Great Powers decided to jointly intervene to resolve the Greek Issue. In 1827, England, France and Russia concluded a treaty in London, calling on both warring sides, Greece and Turkey, to make a truce and enter into negotiations about the establishment of an autonomous Greek state. However, the Sublime Porte, encouraged by its military success, now rejected the intervention.
In October 1827, during the Naval Battle of Navarino, English, French and Russian war ships confronted the combined Turkish and Egyptian fleet. Under the command of Admiral Sir Edward Codrington, who was the lifeblood of the naval battle, Vice-Admiral Henri de Rigny and Vice-Admiral Lodewijk Heyden, they sailed to Pylos to apply the decisions of the Great Powers. What determined the outcome of the battle was on one hand, the great power of allied guns that almost always hit their target and on the other hand, the Turkish and Egyptian forces that were not waiting until dark to use their artillery. In this way, the naval allied forces successfully confronted the Turco-Egyptian fleet, destroying it completely. It should be noted that all three allied squadrons fought in an equally brave manner and in an excellent spirit of cooperation, since on numerous occasions the allied ships had to risk in a self-sacrifice way to help each other.
The good news of the fleet’s destruction were accepted by the Greeks with much enthusiasm. The victory of the allied forces contributed significantly to the liberation of Greece from the Turkish yoke.