History
During the Early Middle Ages, settlers from western Finland mixed with the local population to form the Karelian ethnic group. Possible migration from elsewhere may also have contributed to the Karelian ethnic composition.
Archeological evidence indicates that Karelian inhabitation was highest along the western shore of Lake Ladoga and the Karelian Isthmus, with multiple cemeteries and other archeological discoveries dating from AD 600 to AD 800. In South Karelia, the number of archeological discoveries from this time period is lower, though permanent inhabitation was nonetheless present. Lappee, South Karelia has been continuously inhabited for approximately 2,000 years. In North Karelia, only one archeological discovery from this time period has been found, dating to the eighth century. The considerably higher number of archeological discoveries in these regions from AD 800 to AD 1050 indicates that the Karelian population grew and expanded rapidly during this time.
Karelia was bitterly fought over by Sweden and the Novgorod Republic for a period starting in the 13th-century Swedish-Novgorodian Wars. The Treaty of Nöteborg (Finnish: Pähkinäsaaren rauha) in 1323 divided Karelia between the two. Sweden received the southern portion of the Karelian Isthmus and most of South Karelia. The province of Swedish Karelia would include this territory, plus the region east of the Kymi river, with Viborg (Finnish: Viipuri) becoming the capital of the province. Novgorod received the northern portion of the Karelian Isthmus. North Karelia, Ladoga Karelia, and the northern portion of South Karelia fell under Novgorodian control. Käkisalmi served as the main population center of this region.
In the Treaty of Stolbovo of 1617, large parts of Russian Karelia were ceded to Sweden. Conflicts between the new Swedish rulers and the indigenous population of these areas led to an exodus: thousands of Karelians, including the ancestors of the Tver Karelians, emigrated to Russia.
The Treaty of Nystad (Finnish: Uudenkaupungin rauha) in 1721 between Imperial Russia and Sweden ceded a portion of Karelia to Russia. The Treaty of Åbo in 1743 between Sweden and Russia then ceded South Karelia to Russia. After Finland had been occupied by Russia in the Finnish War, the ceded provinces (Old Finland) were incorporated into the Grand Duchy of Finland in 1812. In 1917, Finland declared independence, and the border was confirmed by the Treaty of Tartu in 1920.
Finnish partisans were involved in attempts to overthrow the Bolsheviks in Russian Karelia (East Karelia) in 1918–1921, as in the failed Aunus expedition. They also wanted to incorporate the rest of Karelia into Finland and cooperated with the short-lived Republic of Uhtua. These mainly private expeditions ended after the signing of the Treaty of Tartu. After the end of the Russian Civil War and the establishment of the Soviet Union in 1922, the Russian part of Karelia became the Karelian autonomous republic of the Soviet Union (ASSR) in 1923.
At the beginning of the Second World War in 1939, the Soviet Union attacked Finland, thus starting the Winter War. The war ended with the signing of the Moscow Peace Treaty in March 1940, which handed a large portion of Finnish Karelia to the Soviet Union, and over 400,000 people had to be relocated within Finland. During the Continuation War of 1941–1944, Finland took back territory ceded in 1940, and also invaded and occupied much of East Karelia. Finland was forced out of these regions in 1944. After the war, Soviet expansion caused considerable bitterness in Finland, which lost its fourth biggest city, Viipuri, its industrial heartland along the river Vuoksi, the eastern portion of the Saimaa canal that connected central Finland to the Gulf of Finland, and access to the fishing waters of Lake Ladoga (Finnish: Laatokka). One eighth of its citizens became refugees with no chance of return. The whole population from the areas ceded to the Soviet Union was evacuated and resettled in other parts of Finland. The present inhabitants of the former Finnish parts of Russia, including the city of Vyborg/Viipuri and the Karelian Isthmus, are post-war immigrants or their descendants.
The former Karelian ASSR was incorporated into a new Karelo-Finnish SSR from 1941 to 1956, but then it became an ASSR again. Karelia was the only Soviet republic that was "demoted" from an SSR to an ASSR within the Russian SFSR. In 1991, with the collapse of the Soviet Union, the ASSR became the Republic of Karelia.
The portion of Viipuri Province that remained within Finland following the Second World War was renamed Kymi Province, and kept this name from 1945 to 1997. The eastern part of this province is now the region of South Karelia, while the western portion is part of Kymenlaakso.