Simeon of Moscow
Prince of Moscow and Grand Prince of Vladimir.
Simeon continued his father's policies of supporting the Golden Horde and acting as its leading enforcer in Russia. Simeon's rule was marked by regular military and political standoffs against Novgorod Republic and Lithuania. His relationships with neighboring Russian principalities remained peaceful if not passive: Simeon stayed aside from conflicts between subordinate princes. He had recourse to war only when war was unavoidable. A relatively quiet period for Moscow was ended by the Black Death that claimed the lives of Simeon and his sons in 1353