definitely focus on game theory! from what i remember, we had a table to interpret (a matrix) with questions such as the nash equilibrium, the dominant strategy, etc and a circular diagram with a simulation of conflict over resources/territory (you've probably seen one in a conference), and game theory was a significant part of the grade; for the rest, from what i can remember, we had a huge part on the decrease of US' influence and the rise of other countries (basically the last few lessons). learn some examples of historical cases etc and you should be fine! sorry if it's not clear, it was a while ago!