The documentary by Andrey Medvedev, “The Great Unknown War” mentions an episode taking place towards the end of the meeting between Iosif Stalin and Anthony Eden in Moscow on the 29th of March 1935, illustrating that the Soviet leadership were fully aware of who igniters of the coming war are, and the inevitability of a war in Europe, despite Soviet Union’s best efforts to prevent it.

The League of Nations.
The Geneva Lawyer: “Where do you see war? Which war? I have no war registered here.”
Additional reading: President Vladimir Putin on keeping the records of the pre-WWII time straight.
Stalin I.V. – Recording of a conversation with the Lord Keeper of the Seal of Great Britain A. Eden
March 29, 1935
The source: Stalin I.V. Works. – Vol. 18. – Tver: Information-publishing center “Soyuz”, 2006. pp. 86-91.
The visit took place in the Kremlin, in the office of comrade Molotov. Attended by: comrades Stalin, Molotov, Litvinov, Maysky, and from the British side – Eden, the British Ambassador, Chilston and the head of the League of Nations section in the British Foreign Office, Strang. The whole conversation lasted about an hour and a quarter.
After the first greetings, Eden began the conversation. He said something like this:
