If happening on a large scale war, suppose our opponent is just that grain superpower. Its 3 big grain companies control a half of the world grain trade. The game rule at war differs from peaceful age. In peaceful age it sells grain to us to be ahead from our pocket and reduces our ability of self-sufficient in grain and increase in dependence on others. In a period of war it does not sell grain to us as weapon. A possibility being is existence that we lose out a war isn’t because of weapon, but grain.
(to be proofread)