The Soviet Union had tied Finland to its security system through the Treaty of Friendship, Cooperation and Mutual Assistance (FCMA) signed between the two in 1948. As the Soviet Union began to disintegrate at the end of the 1980s, Finland exited the Soviet sphere of influence – the region controlled through a system of bilateral and multilateral agreements. This article analyses the Soviet–Finnish negotiations to discard the FCMA treaty as a case study of the changing Soviet European neighbourhood policy. It gives important insights into the disintegration of the Soviet foreign policy mechanism during the Gorbachev era as it elaborates on both the intra-bureaucracy conflicts between the Kremlin and the Soviet foreign ministry, MID, and late...