A former advisor to Vladimir Putin has said after the annexation of Crimea, the Russian president will not stop until he's conquered Belarus, the Baltic states and Finland.
Andrej Illarionov, Putin's chief economic adviser from 2000 to 2005, said claims the ultimate aim is return to the days of Tsar, Nicholas II, and the Soviet Union under Stalin.
Speaking to the Swedish newspaper Svenska Dagbladet, he said: "Putin’s view is that he protects what belongs to him and his predecessors.
"Parts of Georgia, Ukraine, Belarus, the Baltic States and Finland are states where Putin claims to have ownership.
"The West’s leaders seem, from what they say, entirely to have forgotten that there are some leaders in the world who want to conquer other countries."
Dagbladet says Russia will claim the granting of independence to Finland in 1917 was an act of “treason against national interests".
As Finland is not a member of Nato, any attack on the country by Russia would not automatically trigger a military response from the group.
Dagbladet added: "It is not on Putin's agenda today or tomorrow.
"But if Putin is not stopped, the issue will be brought sooner or later. Putin has said several times that the Bolsheviks and Communists made big mistakes. He could well say that the Bolsheviks in 1917 committed treason against Russian national interests by granting Finland's independence.
"We must offer resistance by all means available."