Cipher telegram from Soviet ambassador in London Ivan Maisky with a personal message from Winston Churchill to Joseph Stalin
"It is impossible to open a second front in the Balkans without Turkish cooperation. <...> An action resulting in a costly fiasco, no matter how laudable its motives were, would only benefit Hitler. <...>
We are ready to work out joint plans with you. Will the British armies be sufficiently powerful to invade the European continent in 1942? This depends on unpredictable circumstances. In all probability, we will be able to help you in the Far North during the polar night."