Still, after nearly eight centuries, the sulde carried such a deep emotional meaning to both the Mongols and to some of the people they had conquered that the Russians treated its mere display on a stamp as an act of nationalist revival and potential aggression. The Soviets reacted with irrational anger to the fear that their satellite state might pursue an independent path or, worse yet, side with Mongolia’s other neighbor, China, the Soviet Union’s erstwhile ally turned enemy.