 He did not himself go to Greece, but the troops he sent were heavily defeated by Roger de Llúria and his men.As Roger de Llúria was also engaged in a conflict with the Venetian colony of Negroponte, and due to the danger posed by his Turkish troops to all Christian states of Greece, a coalition comprising Venice, the Knights Hospitaller, the Principality of Achaea, and the Byzantine province of Mystras had formed, which defeated Roger's Turks in a naval battle off Megara and forced him to come to terms in 1365.Despite the fact that the Catalan lords of Athens were now willing to affirm their submission to the King, Moncada was reluctant to go to Greece, where the situation was unstable and perilous; as a result, King Frederick was forced to legitimize Roger de Llúria's power and acknowledge him as vicar-general in late 1366.