Long ago, a big fight started. 

Long ago, a big fight began. 
But the Finnish people fought back. It was a very cold time. 
The fight lasted for a few months. The Soviet Union wanted more land. Finland had to give some land away.
This helped Finland stay free. The people in Finland were very brave. They worked hard to keep their land.
The Winter War was a war between Finland and the Soviet Union. It began in November 1939. The Soviet Union invaded Finland. They wanted to take some land. They said they needed it for safety. They wanted to protect the city of Leningrad. 
The Soviet Union had a very big army. They had many tanks and planes. But the Finnish army fought back hard. The weather was very cold. Temperatures were very low. 

The fight lasted for about three and a half months. The Soviets changed their plans to win. They broke through the Finnish lines in February 1940. Finland had to make a peace deal. 
The Winter War was a conflict between Finland and the Soviet Union. It began on 30 November 1939. This happened just three months after World War II started. The Soviet Union invaded Finland to take some of its land. They claimed they needed this land for security reasons. They wanted to protect the city of Leningrad from the Finnish border. 
The war was a hard job for both sides. The Soviet Union had a much larger military. They had many more tanks and aircraft than the Finns. However, the Soviet army suffered very heavy losses at first. They made very little progress in the beginning. The fighting took place in many places like Taipale and Kollaa. Battles also happened on the Raate Road and in Lapland. 
Finland and the Soviet Union had a long history together. Long ago, Finland was part of the Kingdom of Sweden. Then, the Russian Empire conquered Finland during the Finnish War. Finland became an autonomous state within Russia for a long time. In 1917, Finland finally declared its independence. The Soviet government recognized this new nation three weeks later. 
Many things changed during the three and a half months of fighting. In February 1940, the Soviets changed their tactics. They renewed their attack and broke through Finnish defenses. The Finnish army was near its breaking point. The commander-in-chief, Carl Gustaf Emil Mannerheim, urged a peace deal. On 13 March 1940, they signed the Moscow Peace Treaty. Finland had to give 9% of its territory to the Soviet Union. 
This war had a big impact on the world. The League of Nations said the Soviet attack was illegal. Because of this, they expelled the Soviet Union from the group. The poor performance of the Red Army surprised many people. It even made Adolf Hitler believe he could attack the Soviet Union. Later, in June 1941, a new war called the Continuation War began. Finland kept its sovereignty and its reputation grew stronger.
The Winter War was a military conflict between Finland and the Soviet Union. It began with a Soviet invasion on 30 November 1939. This invasion occurred only three months after the start of World War II. The war lasted for three and a half months. It ended on 13 March 1940, with the signing of the Moscow Peace Treaty. 
Soviet leaders had several reasons for wanting Finnish territory. General Secretary Joseph Stalin believed the Finnish border was too close to Leningrad. He wanted to increase the security of this important city. The Soviets made demands for Finland to cede substantial border territories. They offered to give Finland land elsewhere in exchange. When the Finnish government refused these demands, the Soviet Union invaded. Some historians believe the Soviets intended to conquer all of Finland. They point to the creation of a puppet communist government as evidence. 
The relationship between these two nations had a long history. Until the early nineteenth century, Finland was part of the Kingdom of Sweden. During the Finnish War from 1808 to 1809, the Russian Empire conquered Finland. Finland became an autonomous buffer state known as the Grand Duchy of Finland. This status lasted until the late nineteenth century. During that time, Russia tried to implement a policy of Russification to unify the empire. These attempts failed due to internal Russian strife. In 1917, the Russian Revolution and Civil War allowed Finland to declare independence. The Soviet government recognized Finland's sovereignty three weeks later. 
Despite the 1920 Treaty of Tartu, relations remained very strained. The two nations signed a Non-Aggression Pact in 1932. This pact was reaffirmed in 1934 for ten years. However, the Soviet Union and Finland had different political goals. In August 1939, the Soviet Union and Nazi Germany signed the Molotov–Ribbentrop Pact. This agreement included a secret protocol. It divided Eastern Europe into spheres of influence. Under this protocol, Finland fell into the Soviet sphere.
The actual fighting involved several distinct stages and locations. Initially, the Soviet Union used its superior military strength. They had many more tanks and aircraft than the Finnish forces. However, the Soviet Red Army suffered severe losses during the first two months. Finnish troops successfully repelled attacks in very cold temperatures. Major battles occurred at Taipale and along the Karelian Isthmus. Fighting also took place at Kollaa and on the Raate Road. Battles were even reported in Lapland and North Karelia. 
In February 1940, the Soviet military reorganized its strategy. They adopted new tactics and renewed their offensive. This new push allowed them to overcome Finnish defenses on the Karelian Isthmus. The Finnish Army reached a breaking point and faced an inevitable retreat. The Finnish commander-in-chief, Carl Gustaf Emil Mannerheim, urged a peace negotiation. He wanted to secure a deal while Finland still had bargaining power. The resulting Moscow Peace Treaty required Finland to cede 9% of its territory. The Soviets received large areas along Lake Ladoga and further north. 
The Winter War had significant international consequences. The League of Nations declared the Soviet attack illegal. As a result, the organization expelled the Soviet Union. The Red Army's poor performance also changed how other leaders thought. German Chancellor Adolf Hitler believed a successful attack on the Soviet Union was possible. This belief influenced his later decisions during World War II. After a 15-month period of interim peace, the Continuation War began in June 1941. While Finland lost land, it successfully retained its national sovereignty.
🖼️ Images & Media (21)
+ 9 more
More to explore
✨ What else?
Related topics you might enjoy
🔬 Go deeper
More advanced topics to explore
🪜 Step back
Simpler topics to build understanding
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.