The state originated with the rule of Alexander Nevsky of the Rurik dynasty, when in 1263 his son Daniel I was appointed to rule the newly-created Grand Principality of Moscow, which was a vassal state to the Mongol Empire (under the "Tatar Yoke"), and which was going to eclipse and eventually absorbe its parent duchy of Vladimir-Suzdal by the 1320s. It later annexed the Novgorod Republic in 1478 and conquered the Grand Duchy of Tver in 1485, and ultimately remained vassal state of the Golden Horde until 1480, though there were frequent uprisings and successful military campaigns against the Mongols, such as the war of Dmitri Donskoi in 1380.