Today Russia’s policy toward Ukraine demonstrates that Russian foreign policy has always been expansionist. Russia is eager to control neighboring states through diplomacy and economic ties if possible (to wit, the Eurasian Economic Union), and through destabilization and force if necessary. The Russian drive for empire is so primeval, it has been in evidence even without an “official” ideological doctrine since the collapse of the Soviet Union.
OP-ED
Ariel Cohen: The West has a Ukraine challenge, and it’s not going away
Since the Middle Ages, Kyivan Rus - the loose network of warring principalities whose borders vaguely coincide with today's Ukraine - has been exposed to waves of invaders from neighboring states. This list of aggressors includes the Normans, Mongols, Poles, Ottomans, Habsburg Austrians, Germans, and Nazis - and not least, Muscovite Russians, the Romanov Russian Empire, and Bolsheviks. Each invasion destroyed political and social institutions, produced staggering human casualties, and delayed the country's development.