Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
The order of the army's march, from Doriscus to Acanthus, had been such as I will show. Dividing his entire land army into three parts, Xerxes appointed one of them to march beside his fleet along the coast.
Mardonius and Masistes were the generals of this segment, while another third of the army marched, as appointed, further inland under Tritantaechmes and Gergis. The third part, with which Xerxes himself went, marched between the two, and its generals were Smerdomenes and Megabyzus.