When Darius the Persian had fought with
Alexander at the Granicus, and had lost seven satraps
and five hundred and two scythe-bearing chariots,
he intended to attack again on the next day. But
Ariobarzanes, his son, who was kindly disposed
toward Alexander, promised to betray his father.
But the father fell into a rage and cut off his head.
So Aretades of Cnidus in the third book of his
Macedonian History.
Brutus, unanimously elected consul, drove into
exile Tarquin the Proud, who was comporting himself despotically. Tarquin went to the Etruscans
and began to wage war against the Romans. But
Tarquini sons wished to betray their father. But
they were detected, and Tarquin cut off their heads.
So Aristeides the Milesian in his Italian History.