Simeon the Proud, Prince (Grand Duchy of Moscow (Mongol Empire)) : All Data

Simeon the Proud was a Prince who ruled over the Grand Duchy of Moscow from 1340 to 1353. During his tenure, he faced several significant conflicts, including the Lithuanian-Muscovite War (1348-1351) and the Novgorod-Muscovite War (1350-1351). These wars were consistent with the calculated timespan of Simeon's rule and played a crucial role in shaping the political landscape of the region. Simeon's reign marked a period of territorial expansion and consolidation for the Grand Duchy of Moscow, establishing its prominence as a major power in medieval Russia.