What are the major topics that I should focus on to prepare for the AP Euro Exam?

This came from something my friend told me, he said that the 13th + 14th century (Black Death, Hundred Years War) were not touched upon at all in the exam. I’m writing an All Year study guide to prepare for the exam right now, and I want to know which topics I should focus on the most. Any advice?

19th century is popular. German unification in 1871/Bismarck seems to pop up quite often.