sentences:  The Territorial changes of Russia happened by means of military conquest and by ideological and political unions over the centuries.This section covers (1533–1914).Ivan III (reigned 1462-1505) and Vasili III (reigned 1505-1533) had already expanded Muscovy's (1283–1547) borders considerably by annexing the Novgorod Republic (1478), the Grand Duchy of Tver in 1485, the Pskov Republic in 1510, the Appanage of Volokolamsk in 1513, and the principalities of Ryazan in 1521 and Novgorod-Seversky in 1522.