From the rules(?):Not a war game but a game of world strategy.Tactics duplicates actual world conditions today. It places the player in the position of the head of some neutral or belligerent country and lets him use his own judgment as to how present international problems should be met and overcome.TACTICS may be played by two belligerents, or by two belligerents and one or both neutrals.The object for belligerents is to blockade opponent belligerent's SEAPORT and for neutrals to trade for profit. Blockade is accomplished when a belligerent's SEAPORT is completely cut off from the sea. Trade is accomplished when a SUPPLY SHIP is moved into another player's port. - BoardGameGeek