The problems begin with the other, 'Reviving the Double-Headed Eagle', which can only be chosen if you went with 'Horror and Glory', but can be taken alongside 'Nenikikamen' if you did. 'Nenikikamen' can be chosen with either of the two above, and describes the triumph of Venizelos's Megali Idea and unlocks the decision to create Greater Greece.
It starts with the choice between 'Horror and Glory' and 'The Gordian Knot', which are mutually exclusive choices on how to fight Turkey the former is doing it solo, the latter is with the support of a coalition. Basically, the bottom left of the new Greek focus tree has some odd contradictions.