 Complete the following phrase:  In 1821, the Greeks rose up against the Ottoman Empire. Initial successes were followed by infighting, which almost caused the Greek struggle to collapse; nevertheless, the prolongation of the fight forced the Great Powers Britain, Russia and France to recognize the claims of the Greek rebels to separate statehood Treaty of London and intervene against the Ottomans at the Battle of Navarino. Greece was initially to be an autonomous state under Ottoman suzerainty, but by 1832, in the Treaty of Constantinople, it was recognized as a fully independent kingdom. In the meantime, the 