History of Finland
The history of Finland begins around 9,000 BC during the end of the last glacial period. Stone Age cultures were Kunda, Comb Ceramic, Corded Ware, Kiukainen, and Pöljä cultures. The Finnish Bronze Age started in approximately 1,500 BC and the Iron Age started in 500 BC and lasted until 1,300 AD. Finnish Iron Age cultures can be separated into Finnish proper, Tavastian, and Karelian cultures. The earliest written sources mentioning Finland start to appear from the 12th century onwards when the Catholic Church started to gain a foothold in Southwest Finland.
Greater Finland
The Karelo-Finnish Soviet Socialist Republic (KFSSR) was founded by the Soviet Union at the beginning of the Winter War, and was led by the Terijoki government and Otto Wille Kuusinen. This new entity was created with an eye to absorbing a defeated Finland into one greater Finnic (and Soviet) state, and so the official language returned to Finnish. However, the Soviet military was unable to completely defeat Finland, and this idea came to nothing. Despite this, the KFSSR was maintained as a full union republic (on a par with Ukraine or Kazakhstan, for example) until the end of the Stalinist period, and Finnish was at least nominally an official language until 1956. The territory Finland was forced to cede under the Moscow Peace Treaty was incorporated partly into the KFSSR, but also into Leningrad Oblast to the south and Murmansk Oblast to the north.