Winning a war is virtually the same as a game of chess. You have to pre-plan your moves and wait until the other sides makes a required move first, then you can strike and take out a piece clearing more and more of the board as you go while also moving your players where they will need to be when it comes time to make the last move all while you keep weakening, frustrating the enemy causing them to make mistakes and the movements you want them to make. At the very precise moment when they have ultimately boxed themselves in, then it's D5, you take the kill shot. That's the moment the Trump card will be played (yes, card played in chess) game over, enemy removed, you own the board. Thanks for playing.
Patience grasshopper