From the publisher's website:

At the turn of the 20th century, the seven Great European Powers engage in an intricate struggle for supremacy. Military forces invade and withdraw, shifting borders and altering empires with subtle maneuvers and daring gambits. Form alliances and unhatch your traitorous plots as you negotiate and outwit—in a delicate balance of cooperation and competition—to gain dominance of the continent! In Diplomacy, your success hinges not on the luck of the dice, but your cunning and cleverness.