you wont get penalised - if the markers read something wrong they just have to ignore it, you only lose marks if you dont have the information there :)
there is actually 3 dot points in the Greek World syllabus; 1. is the Persian wars, 2. is the Delian league and 3. is about Athens and Sparta
the third one rarely comes up but has and one year they asked only about 2 and 3. So yes, they could leave out the persian wars, its likely since...