This is a more thorough rules Q&A that I have compiled from the CPG website, the forums at the BGG, and personal e-mail correspondences with Marshall Barrington (Supremacy 2020’s Commander in Chief). It’s a lot of “cut & paste” with minimal editing for clarity or brevity. The answers are 99.9% Marshall’s exact words.
This is not an official document, but it has Marshall’s approval:
“Yes, this looks pretty good”