ATHANATI

ATHANATI, an Order of Soldiers among the ancient Persians.
The Word is originally Greek, and signifies immortal, being compounded of the privative α, and θνῆσκω, to die.
The Athanati were a Body of Cavalry, consisting of ten thousand Men, always complete, because, when any one of them died, another was immediately put into his place—It was for this Reason that they were called Athanati, or Immortals.

ATHANATI