Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Over thirty political prisoners in this country were broken out by the right-wing Organization X, which rose to prominence during the "December events". A former Russian cavalry officer who led the "Society of Friends" of this nation was named Alexander Ypsilantis. During its war of independence, the Ottomans lost the Battle of Navarino. In ancient times, this modern-day nation fought against the Persians under the leadership of Themistocles at Salamis. Cleisthenes and Solon laid the foundations for this nation's democracy. For 10 points, name this European country formerly led by George Papandreou from Athens.
History