Since 1500: The conflict between Vladimir-Suzdal and Kiev-Chernigov continues to simmer. Trade between the two Russias is often hampered, conflicts several times lead to war (although neither country is strong enough to subdue the other one). Both nations build forts and later fortresses along their common border. ~1510: Settlements in Novorossiya as far as Yenissei river. 1512-17: Novgorodian War. Vladimir-Suzdal defeats the old competitor, annexes it. Many Novgorodians who miss their old freedom go to Novorossiya. ~1540: Settlements in Novorossiya at Lake Baikal.