300 is a 1998 limited series comic book written and illustrated by Frank Miller with painted colors by Lynn Varley.
Book cover
Immortals, or Persian Immortals, was the name given by the Greek historian Herodotus to a 10,000-strong unit of elite heavy infantry in the Achaemenid army. They served in a dual capacity, operating a
Depiction of the "Susian guards" from the Palace of Darius in Susa. Their garments match the description of the Immortals by ancient authors.
Modern interpretation of ceremonially dressed Immortals for the Celebration of the 2,500th Anniversary of the Founding of the Persian Empire, 1971
A Median (left) and a Persian (right), both in army ceremonial dress, depicted in ancient carvings at Persepolis. Some scholars speculate that these warriors represent the Immortals.