Suli or Souli (both: sōō´lyē), small mountainous district, N Greece, in Epirus. Its inhabitants, the Suliotes, who lived in fortlike villages in the mountains, remained independent during most of the occupation of Greece by the Ottoman Turks. They fought successfully (1790–1802) against Ali Pasha, the Turkish governor of Ioánnina. In 1803, however, Ali Pasha massacred many of them after concluding a false truce. The Suliotes were again decimated in a new rebellion in 1820, when many fled to the Ionian Islands.