Historical Events
- Mar 15 Battle of Halmyros: Catalan Company defeats the Frankish Duchy of Athens and its vassals led by Walter V of Brienne to take control of the Duchy of Athens, a Crusader state in Greece
Famous Deaths
- Mar 15 Walter V of Brienne, Duke of Athens (1308-15), killed in action at the Battle of Halmyros aged 35 or 36