The Catalan Company's defeat of the Frankish Duchy of Athens ended Frankish rule and established Catalan control over Athens for over seven decades.
Key Facts
- Date
- 15 March 1311
- Victor
- Catalan Company (mercenaries)
- Defeated side
- Frankish Duchy of Athens under Walter of Brienne
- Catalan rule of Athens lasted until
- 1380s
- Key tactical advantage
- Catalans positioned behind inundated marshy terrain
- Walter of Brienne's fate
- Killed in battle along with almost entire knighthood
Location
Cause → Event → Consequence
The Catalan Company, originally hired by the Byzantine Empire, had drifted into southern Greece by 1309. Walter of Brienne, Duke of Athens, engaged them to conquer Thessaly, but after they succeeded he refused to pay their wages and moved to expel them by force, provoking open conflict.
At Halmyros in southern Thessaly on 15 March 1311, the outnumbered Catalans exploited marshy ground they had deliberately flooded, halting the Frankish heavy cavalry charge. Their infantry held firm, Turkish auxiliaries rejoined the fight, and the Frankish army was routed. Walter of Brienne and nearly the entire knighthood of the Duchy of Athens were slain.
With Walter dead and Frankish leadership destroyed, the leaderless Duchy of Athens fell to the victorious Catalans. The Catalan Company assumed control of the duchy and ruled that portion of Greece until the 1380s, fundamentally altering the political landscape of Frankish Greece.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Walter of Brienne.
Side B
1 belligerent