This document discusses cyber strategy foundations and introduces some dilemmas. It notes that cyber is an innovative domain that is non-tangible, with obscure dividing lines between the cyber and physical worlds. Attribution and deniability in cyber attacks also make the domain convoluted. The document questions whether cyber is a new dimension in conflicts and how it relates to other dimensions. It gives examples of strategic dilemmas like how to achieve national cyber segmentation and when situational awareness justifies attack versus retaliation in cyber conflicts.