 Complete the following phrase:  After years of negotiation, three great powers, France, Russian Empire, and the United Kingdom, decided to intervene in the conflict and each nation sent a navy to Greece. Following news that combined OttomanEgyptian fleets were going to attack the Greek island of Hydra, the allied fleet intercepted the OttomanEgyptian fleet at Navarino. A week-long standoff ended with the Battle of Navarino 20 October 1827 which resulted in the destruction of the OttomanEgyptian fleet. A 