The Soviet government entered into
diplomatic relations with the Finnish Democratic Republic's government immediately after its creation. On the first day of its existence, the Kuusinen regime agreed to lease the
Hanko Peninsula; to cede a slice of territory on the
Karelian Isthmus; and to sell an island in the
Gulf of Finland, along with sections of the
Kalastajasaarento near the
Arctic Ocean to the Soviet Union. On 2 December 1939, Kuusinen and Molotov signed a mutual assistance agreement and a secret protocol in
Moscow. The content of the agreement was very similar to what the Soviet foreign ministry had planned earlier in October 1939, though it never was presented to the Finnish government. According to the new agreement, the Soviet Union would cede a much larger area,
Eastern Karelia, except for the
Murmansk railroad, in exchange for the same territories that the Soviets had demanded in
earlier negotiations from the Republic of Finland. An earlier draft of the Moscow agreement was signed ten days earlier at
Petrozavodsk by
Andrei Zhdanov for the USSR and Kuusinen for the Republic. The Molotov–Kuusinen agreement mentioned leasing the Hanko Peninsula, and determining the number of troops to be appointed in a separate agreement. Before the 1990s, historians could only speculate about its existence and content. In 1997, during a joint Finnish-
Russian project, Russian professor Oleg Rzesevski discovered the protocol in the
Kremlin. The content is quite similar to protocols the Soviet Union signed with
Estonia,
Latvia and
Lithuania in September–October 1939. == Reaction in Finland and abroad ==