There’s certainly a big hand wave here between describing Risk in terms of stocks and flows, and the strategies that he then goes in to propose. Honestly the systems thinking analysis here is weak in that at no point does he characterize the opponents or their armies and countries as part of the system - where he actually then relies on their behavior as a component of strategy (getting them to fight among themselves, for example). There’s discussion of how the strategy manages ‘opponent fear’, but he hasn’t explained that as a stock.