Thessaly and the Duchy of Neopatras Timeline

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c. 1267 CE

The independent state of Thessaly is established under John I Doukas.
c. 1267 CE - 1289 CE

Reign of John I Doukas in Thessaly.
1277 CE

Attempted Byzantine invasion of Thessaly.
1282 CE

Attempted Byzantine invasion of Thessaly failed due to the death of Michael VIII Palaiologos.
1289 CE - 1303 CE

Reign of Constantine Doukas in Thessaly.
1289 CE - 1299 CE

Reign of Theodore Doukas in Thessaly.
1295 CE

Byzantine Emperor Andronikos II Palaiologos grants the title of sebastokrator to Constantine and Theodore Doukas of Thessaly.
1303 CE - 1318 CE

Reign of John II Doukas in Thessaly.
1309 CE

Walter of Brienne, Duke of Athens, engages the Catalan Company to bring Thessaly under Athenian control.
1311 CE

Battle of Halmyros: the Catalan Company defeats and kills Walter of Brienne, Duke of Athens.
1318 CE

Dissolution of Thessaly upon the death of John II Doukas.
1319 CE - 1394 CE

Duchy of Neopatras, under the Duchy of Athens.