Battle of Tolvajärvi, 1939: Finland's first victory of the Winter War

In the first weeks of the Winter War the Finns north of Lake Ladoga did mostly one thing: fall back. On 12 December 1939, at a chain of frozen lakes near the village of Tolvajärvi, they attacked instead and drove a Soviet division off. It was the first major Finnish victory of the war. In the words of a historian quoted by Yle, it gave the nation faith.²

Who won the Battle of Tolvajärvi and why?

Finland won. On 12 December Detachment P under Lieutenant Colonel Aaro Pajari attacked the Soviet 139th Rifle Division at Tolvajärvi. When the planned envelopment in the north failed, Pajari switched to an open attack and threw his reserves into the enemy center, which gave way. The Soviet division fell back east with heavy losses.³

Background: the threat north of Lake Ladoga

The Soviet Union invaded Finland on the morning of 30 November 1939. North of Lake Ladoga the Soviet 8th Army crossed the border at once, and the few Finnish battalions in its path fell back. The danger went far beyond the forests of Ladoga Karelia. Had the Soviets broken through here, they could have struck the rear of the Finnish army on the Karelian Isthmus, and the Finnish IV Corps fighting north of the lake risked being cut off.⁴

The roads explain the danger. The border country had very few of them, by Finnish design: the Finns could not afford to let Soviet columns reach the denser network further west, where they could join up and shift their weight, so the invasion had to be stopped in the wilderness. The road through Tolvajärvi led to Korpiselkä and Värtsilä, from where routes opened toward the rear of the army on the Isthmus.⁵

Tolvajärvi was one of two crises north of the lake. Further south the Soviets reached the Kollaa River on 7 December, and the Finnish IV Corps had to hold there too: if Kollaa gave way, the position north of Ladoga would become untenable and the defense of the Isthmus would be in danger. Kollaa held until the end of the war, and its defense became a byword in Finland.⁶

On the northern flank of this advance a Soviet rifle corps struck west with two divisions: the 155th Rifle Division toward Ilomantsi, and the 139th toward Tolvajärvi and, beyond it, Korpiselkä. The Finnish delaying troops on the Tolvajärvi road, a force put together from whatever units were available and short of artillery, were reinforced in the first days of December but could not stop the division. By 8 December it had reached the lakes of Tolvajärvi and Hirvasjärvi.⁷

Armies and commanders

Talvela. To meet the threat Field Marshal Mannerheim turned to Colonel Paavo Talvela. In the first week of December he put Talvela in command of all the troops facing Ilomantsi and Tolvajärvi, with orders to stop the Soviets and counterattack. His command went into the records as Group Talvela, and its troops on the Tolvajärvi road became Detachment P, after their commander.⁸

Talvela was a Jäger officer, one of the Finns trained in Germany during World War I. In 1919 he had led troops in the Aunus expedition into Soviet Karelia, and in 1930 he left the army. Recalled in 1939, he had been serving as a staff officer for war economy and armaments.⁹

Pajari. The core of the reinforcements was the 16th Infantry Regiment, raised from men of northern Häme, which was sent north with an artillery battalion. At Talvela's request its commander, Lieutenant Colonel Aaro Pajari, took charge of the front. He had a legendary reputation. The Vapriikki museum in Tampere describes a controversial, colorful commander, criticized by many of his colleagues but valued by his men, who already during the war called themselves “Pajari's men.”¹⁰

The Soviets. Facing them was the 139th Rifle Division, part of the 8th Army, which had been pushing the Finns back since the first days of the war. Its task was to destroy the Finnish forces at Tolvajärvi and Hirvasjärvi and push on to Korpiselkä.¹¹

The battle in phases

8 December. The 139th attacked on 8 December and took the eastern shores of Lake Tolvajärvi and Lake Hirvasjärvi. Pajari answered the same day with a counterattack on the eastern shore of Tolvajärvi, which he led himself. It was the first time the Finns there had gone over to the attack.¹²

10 and 11 December. A Finnish attack was ordered, but the Soviets struck first. On 10 December the Finns threw back Soviet attempts to cross to the western shore of Tolvajärvi, but that evening a Soviet regiment that had worked its way through the forest struck the rear of Detachment P. By the morning of 11 December the threat was over, and the Finnish attack was put off until the next day.¹³

The plan. Pajari meant to destroy the division with a pincer. One force was to cross Lake Hirvasjärvi and envelop the Soviets from the north, a second was to strike in the south toward the island of Kotisaari, and the main force was to attack across the narrow isthmus between the lakes in the center.¹⁴

12 December. The attack went in on the morning of 12 December and did not go as planned. The envelopment from the north failed. Pajari sent his men into an open attack instead, and the decisive blow came from the west: a frontal attack across the Tolvajärvi isthmus, through the terrain around the Tolvajärvi tourist lodge. The fighting was fierce and extremely hard on the attackers.¹⁵

At 5 p.m. Pajari reported to Talvela. The encirclement of the northern wing had failed, he wrote, but the southern flank had taken Kotisaari and the center had fought its way onto the isthmus; at 1 p.m. he had put most of his reserves into the center, and the enemy's defense had fallen apart. The battle had been extremely hard on all his troops, and the losses were considerable. By the end of the day the Soviet division was falling back to the east.¹⁶

Turning point: the first victory

Until then the Winter War north of Ladoga had been a story of Finnish retreats. Tolvajärvi was the first large-scale Finnish offensive victory of the war, won by a counterattack against a division that had been advancing for almost two weeks. For a time, the Finnish Military Museum's account says, the beaten division was almost incapable of fighting; the American documentary site Fire and Ice says it was in full retreat.¹⁷

It was not how the Finns had been taught to win. Their doctrine disliked costly frontal attacks and preferred envelopments: a frontal attack was allowed only when an encirclement was impossible. The military historian Pasi Tuunainen calls Pajari's attack unscrupulous, and sees in it the Finnish talent for adapting to the situation, a maxim of pursuit included: once the enemy is disorganized and retreating, a smaller force can keep it running.¹⁸

The Soviet weaknesses were general ones. The Red Army had been built for massed offensives in Central Europe; in the forests of eastern Finland its tanks and guns were tied to a few narrow roads, and its rigid planning left little room to improvise when the situation did not follow the book. Tuunainen argues that because the Red Army attacked to a plan, the Finns could anticipate it and act first, and he cites the Tolvajärvi frontal attack as an example of their flexibility.¹⁹

How many died at Tolvajärvi?

The two Finnish museum accounts give casualty figures that measure different things: one counts the day's attack, the other the whole month of December. Both put Soviet losses at many times the Finnish ones.²⁰

Museo Militaria counts about 100 Finns killed in the attack of 12 December and ten times as many Soviet dead.²¹

Aftermath: Ägläjärvi and the Aittojoki

The Finns followed up at once and pushed east toward the village of Ägläjärvi. Mannerheim promoted Talvela to major general on 18 December, and Pajari to colonel. The pursuit took them past Ägläjärvi to the Aittojoki River, where the front stayed until the end of the war.²²

The two accounts differ on the last day. The Finnish Military Museum's Winter War site dates the capture of Ägläjärvi to 22 December and the halt at the Aittojoki to the next day; the Via Karelia heritage route says the Soviet division had been pushed back to the Aittojoki by 22 December. Fire and Ice dates the rout there to 20 to 22 December.²³

Talvela did not stay. In late February 1940 he was sent to the Karelian Isthmus to command the III Army Corps in the last weeks of the war.²⁴

Further north the Finns held too. Around Ilomantsi the 155th Rifle Division pushed the delaying troops back toward Möhkö and Oinaansalmi, and on 9 December a Soviet battalion slipped behind the Finnish line near the Kallioniemi ferry before being surrounded and almost destroyed the next day. After the battle of Taivallampi on 15 and 16 December restored the road to the rear, the front settled on the Kallioniemi to Oinaansalmi line for the rest of the war.²⁵

Legacy and memory

The battle mattered more than its size. Museo Militaria writes that it increased the confidence of the entire Finnish Defence Forces. The Vapriikki museum calls it the first large-scale Finnish victory and says the confidence it built significantly affected the outcome of the war. Tuunainen counts Tolvajärvi and Suomussalmi as the first victories in the series, which restored confidence and lifted the morale of the field army and the home front. It also stopped the Soviet division north of Ladoga from turning the flank of the army on the Isthmus.²⁶

Tolvajärvi was not alone for long. On the same day, 12 December, Colonel Hjalmar Siilasvuo began the counterattack at Suomussalmi in central Finland, where his 9th Division went on to defeat two Soviet divisions in turn.²⁷

The war itself was lost. The Treaty of Moscow, signed on 12 March 1940, ended the fighting the next day, and Finland ceded territory to the Soviet Union, among it the northern shore of Lake Ladoga. The new border left Tolvajärvi and Ägläjärvi on the Soviet side, where they remain.²⁸ › Greatest Ambushes in History

Pajari went on to command a division in the Continuation War and was twice awarded the Mannerheim Cross. He died in 1949. His men's name for themselves survived him: “Pajari's men” became the name of their veterans' tradition, and of the Vapriikki exhibition that tells their story.²⁹