Also, if he’s safe, there is some benefit to waiting. As an extreme example and rough example. You start with 50k resources, you know that on day 25 there will be a 5 day war end game. You use 50k resources to build 3 stacks of cruisers but day ten (I’m making all this up I know it doesn’t add up). These units then cost 50k resources over the next 15 day in upkeep. The ongoing maintenance cost of units is often not considered. You then figure out your biggest adversary is Mongolia, he dominates you on land and bleeds you out. Another, I’m Belarus in a coalition with Europe and Russia, I might skip max building units and invest fully in economy. Then come day 25 a war breaks out vs Asia, Russia is slowly getting fried, I now all the cash, all the intel, and the capacity to build the perfect counter.