By focusing on the northern Iranian province of Gilan, this article rethinks the role of non-socialist revolutionary movements in the Soviets’ early retreat from West and South Asia. Drawing primarily on the records of the Russian Foreign Ministry Archive, it probes programmatic divisions within the Soviet Socialist Republic of Iran (SSRI, 1920–1921), a self-governing provincial exclave where the Soviets attempted to reorient social democratic currents toward socialism. This article asks how, in a moment of revolutionary optimism, internal factionalism and the consequent collapse of the SSRI impeded Soviet designs not only in Iran, but also on the colonized and semi-colonized fronts that lay beyond Iranian borders. In so doing, it reflects on the directions of early Soviet engagement with West and South Asian revolutionaries, and the importance of bridging socialist and non-socialist political projects to realizing the broader aim of regional decolonization.