When Alexander the Great entered Caria in 334 BC, Ada adopted Alexander as her son and surrendered Alinda to him. Alexander accepted her offer and, in return, gave Ada formal command of the Siege of Halicarnassus. After the fall of Halicarnassus, Alexander returned Alinda to Ada and made her queen of all of Caria. Ada's popularity with the populace in turn ensured the Carians' loyalty to Alexander.