To prevent this marriage of the queen with his strongest rival, Antigonus put her to death. Cleopatra manifested the same strength of personality and independence of character as her mother Olympias, and she had, in addition, all the advantages of education and culture which would naturally accrue to the sister of Alexander. She differed most strongly from her mother and other Macedonian princesses of the day, in that no murders could be laid at her door. When we come to Cynane, the third daughter of Philip, we find another type of womanhood. She showed her Illyrian blood in her fondness for outdoor exercise, being a skilled horsewoman, and she would even enter into battle at the head of her troops. She was first married by Philip to her cousin Amyntas. Left a widow, she devoted herself to the education of her daughter, Eurydice, whom she trained in the same martial exercises for which she herself was famous. When Philip Arrhidaeus, the imbecile half-brother of Alexander, son of a female dancer, Philinna of Larissa, was proclaimed joint heir with the posthumous son of Roxana to Alexander's dominions, Cynane determined to marry him to her daughter, and started over to Asia to accomplish this end. As her influence was great, Perdiccas and Antipater determined to forestall such a contingency by the murder of the mother, and Perdiccas sent his brother Alcetas to meet her on the way and put her to death. By her valor and her eloquence, however, she won over the Macedonian warriors, so that the schemes of the generals could not be publicly carried out; but, in defiance of the feelings of the soldiery, Alcetas secretly consummated the ruthless plot, and Cynane met her doom with dauntless spirit. After the death of the mother, the discontent of the Macedonian troops and the respect with which they looked on Eurydice, as one of the few surviving members of the royal house, induced Perdiccas not only to spare Eurydice's life, but also to give her in marriage to the unhappy King Philip Arrhidasus, whose weakened intellectual powers were due to the drugs of Olympias--the queen who never ceased to wreak her vengeance upon her rivals in Philip's affections and upon their ill-fated offspring.