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en-wikipedia-org-800		Immortals (Achaemenid Empire) - Wikipedia			.html	text/html	1621	185	66	The Immortals (Ancient Greek: Ἀθάνατοι, romanized: Athánatoi) also known as the Persian Immortals was the name given by Herodotus to an elite heavily-armed infantry unit of 10,000 soldiers in the army of the Achaemenid Empire. The Persian denomination of the unit is uncertain.[4] This elite corps is only called the 'Immortals' in sources based on Herodotus. Main article: Immortals (Sasanian Empire) The first reoccurrence of the word "Immortals" is in Roman historians' description of an elite cavalry unit of the army of the Sasanian Empire. However, recent scholarship has doubted that the Roman description of the force, including their name, their size, and that they were modeled on the Achaemenid Immortals, although there may have been one or more of such distinct elite cavalry units in the Sasanian period. Main article: Immortals (Byzantine Empire) The designation "Immortal" to describe a military unit was used twice during the Byzantine Empire, first as elite heavy cavalry under John I Tzimiskes (r.	./cache/en-wikipedia-org-800.html	./txt/en-wikipedia-org-800.txt