The Times knew what it was talking about. For Finland
is indeed the key to Leningrad, and Leningrad is the key to
Moscow. He who wishes to defeat our Soviet country must
have Finland at his command as the key to Leningrad, and
Leningrad as the key to Moscow, the heart of our country.
From this, however, it follows that to ensure friendship between Finland and the U.S.S.R. and to strengthen the security
of the approaches to Leningrad means at the same time to
safeguard the security of our whole country. The historic
significance of the treaty between the U.S.S.R. and the Democratic Republic of Finland consists, among other things, in
that it transforms Finland from the hotbed of anti-Soviet
intrigue and war provocations it has been until recently into
a reliable bulwark of peace in Northeastern Europe.
Thereby an end is put to the imperialists' anti-Soviet
machinations in this part of Europe.
The security of Leningrad and its approaches should henceforth be considered as safeguarded.
Source: The U.S.S.R. and Finland. Outstanding Facts and Documents, pp. 41-46. Foreign Languages Publishing House. Moscow 1939.
Finland in the
Soviet foreign policy 1939-1940