Herodotus,
The Histories: "
Astyages, as soon as Cyrus was born, sent for Harpagus, a man of his own house and the most faithful of the Medes...." "When Cyrus beheld the Lydians arranging themselves in order of battle on this plain, fearful of the strength of their cavalry, he adopted a device which Harpagus, one of the Medes, suggested to him. He collected together all the camels that had come in the train of his army to carry the provisions and the baggage, and taking off their loads, he mounted riders upon them accoutred as horsemen. These he commanded to advance in front of his other troops against the Lydian horse..." "Astyages, meanwhile, took the son of Harpagus, and slew him, after which he cut him in pieces, and roasted some portions before the fire, and boiled others..." "When Cyrus grew to manhood, and became known as the bravest and most popular of all his compeers, Harpagus, who was bent on revenging himself upon Astyages, began to pay him court by gifts and messages..." "Upon
Mazares' death, Harpagus was sent down to the coast to succeed to his command. He also was of the race of the Medes, being the man whom the Median king, Astyages, feasted at the unholy banquet, and who lent his aid to place Cyrus upon the throne..." "After conquering the Ionians, Harpagus proceeded to attack the Carians, the Caunians, and the Lycians. The Ionians and Aeolians were forced to serve in his army..."
The Chronicle of Nabonidus: "King Astyages called up his troops and marched against Cyrus, king of
Anšan (southwest
Iran), in order to meet him in battle. The army of Astyages revolted against him and in fetters they delivered him to Cyrus. Cyrus marched against the country
Ecbatana; the royal residence he seized; silver, gold, other valuables of the country Ecbatana he took as booty and brought to Anšan." ==Military career==