Complete the following sentence: In 1445, the faction of nobles allied with Álvaro's main enemies, the Infantes of Aragon, were defeated at the
I Batalha de Olmedo. ąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąą Luna, who had been Constable of Castile and Count of San Esteban de Gormaz since 1423, became Grand Master of the Order of Santiago by election of the Knights.