<Li> In 1821 the Greek revolution, striving to create an independent Greece, broke out on Romanian ground, briefly supported by the princes of Moldavia and Muntenia . </Li> <Li> A secret Greek nationalist organization called the Friendly Society (Filiki Eteria) was formed in Odessa during 1814 . On March 25 (now Greek Independence Day) 1821 of the Julian Calendar / 6 April 1821 of the Gregorian Calendar the Orthodox Metropolitan Germanos of Patras proclaimed the national uprising . Simultaneous risings were planned across Greece, including in Macedonia, Crete and Cyprus . The revolt began in March 1821 when Alexandros Ypsilantis, the leader of the Etairists, crossed the Prut River into Turkish - held Moldavia with a small force of troops . With the initial advantage of surprise, the Greeks succeeded in liberating the Peloponnese and some other areas . </Li> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr>

During the tanzimat era of the ottoman empire nationalism was to be based