The real founder of the Lydian empire.
For several years he continued the war against Miletus begun by his father, but was obliged to turn his attention to the Medes and Babylonians. On May 28, 585 BC, during a battle on the Halys against Cyaxares, king of Media, a solar eclipse took place (see also Thales); hostilities were suspended, peace concluded, and the Halys fixed as the boundary between the two kingdoms.
Alyattes drove the Cimmerii (see Scythia) from Asia, subdued the Carians, and took several Ionian cities (Smyrna, Colophon). (Smyrna was sacked and destroyed c.600 BC, the inhabitants forced to move to the country.)
He standardised the weight of coins (1 Stater = 168 grains of wheat). The coins were produced using an anvil die technique and stamped with the Lion's head, the symbol of the Mermnadae.
He was succeeded by his son Croesus.