Duchy of Athens
In 1309, Walter I of Brienne succeeded to the Duchy of Athens, but he and many of the most important lords of Frankish Greece fell in the Battle of Halmyros in March 1311 against the Catalan Company. In its aftermath, the Catalans took over the Duchy of Athens and, with the military capacity of the remaining Latin states of Greece crippled, threatened to invade the Morea and take over Argos and Nauplia as well. After briefly holding Athens against the Catalans, Walter's widow, Joanna of Châtillon, went to France to solicit aid from her father, the Constable of France Gaucher V de Châtillon, whom she appointed "bailli" in her name on 22 November 1312.