East Karelian uprising

Background

After Finland declared independence, some Finnish nationalists sought a Greater Finland by annexing East Karelia, aiming to unite Balto-Finnic peoples. Two earlier volunteer incursions, the Viena and Aunus expeditions, occurred; Finnish historiography does not consider them wars against Russia, while Russia views them as part of a First Soviet–Finnish War. The Treaty of Tartu ended border disputes, with Finland and the Baltic states recognizing the Russian Soviet Federative Socialist Republic.

According to Arvo Tuominen, the Soviet Union failed to grant Karelia the autonomy stipulated in the treaty, contradicting its own Leninist policy of national self-determination, which had affirmed the right of peoples to secede. The uprising was motivated by East Karelians' experience under Bolshevik rule—broken autonomy promises, food shortages—and by nationalist activists who wanted to overturn the "shameful peace" of Tartu. Finnish kindred activists, including Jalmari Takkinen, campaigned in summer 1921 to rouse East Karelians against Bolshevik forces during the Russian Civil War.

East Karelian paramilitaries, calling themselves Karjalan metsäsissit (Forest Guerrillas), controlled much of White Karelia by autumn 1921.

Preparations

Irredentists in Repola county, with silent approval from the Finnish foreign ministry, devised a contingency plan called Karhunpesäsuunnitelma (Project Bear's Den). They obtained 500 Japanese rifles and 100,000 cartridges from Elmo Kaila, a Jäger Movement leader, plus two Maxim machine guns and four Lewis Guns. Finnish customs officials overlooked the weapons shipments. On 6 January 1921, an aide to Foreign Minister Rudolf Holsti demanded an official account of the weapons.

Repola's irredentist leader Bobi Sivén then received a letter from the foreign ministry instructing him to prevent the arming of Repola and Porajärvi. On 12 January, Sivén shot himself in the heart, imitating Eugen Schauman's suicide method, leaving letters expressing resentment at Finland's "betrayal" of East Karelians. He became a minor Finnic national hero and martyr. After his death, early uprisings and Finnish government interest in supporting them waned.

The uprising

In mid-October 1921, a council of Karelian Forest Guerrillas voted for secession from Soviet Russia. Key leaders included Jalmari Takkinen (alias Ilmarinen), Ossippa Borissainen, and Vaseli Levonen (alias Ukki Väinämöinen), whose resemblance to a Finnish mythical figure made him a suitable ideological leader. Unlike other heimosodat, the initiative came from East Karelian separatists, with the Finnish government remaining officially passive. The uprising began with summary executions of suspected Bolsheviks and escalated into military engagements in October–November 1921.

The 2,500 Forest Guerrillas, though poorly equipped, were initially successful. The rebels expected Finnish military intervention, but the government denied official enlistment while not preventing private volunteers from crossing the border. Finland sent humanitarian aid, risking war with the RSFSR. Soviet historians claimed Finland militarily supported the uprising.

In northern White Karelia, the Vienan Rykmentti (Viena Regiment) was formed. On 6 November 1921, Finnish and Karelian forces attacked at Rukajärvi; Russian historian Alexander Shirokorad claims the force numbered 5,000–6,000, double the total rebel strength per Finnish records.

Defeat of the uprising

Finnish volunteer and humanitarian support worsened diplomatic relations with Russia. Leon Trotsky, Red Army commander, threatened to march on Helsinki and deployed 20,000 troops via the Murmansk railway. By winter, the Forest Guerrillas collapsed under superior Red Army numbers, famine, and extreme cold. Rebels panicked and retreated toward Finland. According to Shirokorad, the Red Army crushed the main Finnish and Karelian force by early January 1922, retaking Porosozero and Reboly. On 25 January, Soviet troops occupied Kestenga and Kokkosalmi, and by early February, Ukhta. His assassination on 12 February 1922 by a Finnish nationalist did not change the situation. The last unit, remnants of the Viena Regiment, fled Tiirovaara on 16 February 1922, reaching the border at 1 pm.