Persian military elite units: Immortals all?

The Achaemenid Persian army had a number of elite military units who performed a military role similar to the special military forces in any 21st century nation. They were highly trained, received special benefits and were employed in the most difficult campaigns. The written and archaeological evidence presents a rich picture of them and their role. This source-based homework task is designed to build student understanding of the NSW Ancient History syllabus
Higher School Certificate course
Part III: Historical Periods
Option F: The Near East: Persia from Cyrus II to Darius III