Step 1 : Introduction to the question "5. What was the name of Xerxes's elite, 10,000 strong force of highly trained soldiers?"
...1. Invincibles 2. Demi-Gods 3. Super-Humans 4. Immortals The Immortals were constantly kept at a force of 10,000, if a member was killed or wounded, he was immediately replaced. The Immortals fought on the second day of the Battle of Thermopylae, however, the Spartans were able to fend off the Immortals and they had to retreat for the day.
