This should go in the map's specific topic. But before it gets there, let me say this:
NONONONONO
The person who managed to scrounge up the armies to bombard the other from their country missile
should win, unless they completely screw it up. If both players are confined to their missile, then they should hurry up and fortify their men so they can get through to the missile launch and end the game. If both players completely eliminate each other from the missile, then logically, in sequential, the person who eliminated the other from the missile first would end their turn first, therefore, they would would not deadbeat before the other. In freestyle, it's up to whoever is fastest. Same with any other freestyle game
