One of the distinctive criteria of games compared to ‚reality‘ is their loose connection to the latter, a worksafe simplification of rules and goals. This doesn’t mean that these games are simple to play, but that rules and metarules are stated or can at least be relied upon as unchanging background as long as we play the game.
The same two mechanisms, simplification and a stated stable background, are the cornerstones of politics, especially in times of war. Knowing the enemy, recognizing the enemy, destroying the enemy, all executed in an unerring, straightforward mode.