What were Darius III's achievements?

Darius II is best known as the Persian king defeated by Alexander the Great. But there is far more to him and his rule. He achieved military success against the Cadusians and the Egyptians, he was proactive in using diplomacy to undermine the support of the Macedonians amongst the Greek states and then attempted diplomacy to end the Macedonian invasion (both unsuccessful) and he continued the building works at Persepolis. This source-based homework task supports the teaching of the NSW Ancient History Syllabus for the Australian Curriculum:
Higher School Certificate course
Historical Periods
Option D: Persia from Cyrus II to the death of Darius III