Early Finnish saga 2.

Saga of Olaf Haraldson tells how the Saint Olaf himself, the King of Norway, plundered in Finland around 1008 and almost got killed at the Battle at Herdaler. Vague chronicle entries briefly mention Danish expeditions to Finland in the 1190s and 1202. Nothing is known about their results except what can be read from a papal letter from 1209 to the Archbishop of Lund which lets the reader understand the church in Finland be at least partly established by Danish efforts. According to Icelandic chronicles, Kvens were raiding in northern Norway in 1271.

                                                Olaf Haraldson / Olaf II of Norway

Finland was probably the same as Terra Feminarum (Kvinnors Land = Women's Land) (Kvenish-land or Quakers-Land is right) which was attacked by Sweden in the 1050s, as described in Gesta Hammaburgensis Ecclesiae Pontificum (Deeds of Bishops of the Hamburg Church) by Adam of Bremen in 1075 CE. According to the source, the attack ended in the Swedish defeat, and led to the death of the king's son who was in charge of the campaign. Information on the conflict is however convoluted.
Ynglingasaga written in early 13th century describes military expedition to Finland at the end of the 4th century by mythological Swedish king Agne. However, it is disputed whether the Old Norse concept of Finland refers to the present country of Finland; alternatively it could have meant the land of the Sámi.

Legendary Orkneyinga saga written around 1230 tells about Nor who travelled from Kvenland to Norway and took over the entire country. Based on saga's internal chronologies, the war would have taken place on the 6th or 7th century. Another version of the saga, Hversu Noregr byggdist, however omits the Kvenland part completely.

                                     Osterland (Eastland = old Finland area) 
                                                   
Norna-Gests þáttr saga from the early 14th century tells that Kvens (probably referring to a group of Finns) were raiding in Sweden in the mid-8th century. In the late 9th century, king Eric Anundsson was said to have conquered Finland, with several other eastern countries. However, all other accounts of the king exclude Finland from his conquests. Norwegian Ohthere tells in the Old English Orosius from 890 that Norwegians and Kvens (Qwenas) were in conflict with each other from time to time.

The best-known Swedish war against Finland presumably took place in the 1150s known as the legendary First Swedish Crusade. Whether it ever actually happened, is however not certain as the information is based on the late 13th century legends. Sweden eventually took over Finland during the so-called Second Swedish Crusade around 1249 against Tavastians and the Third Swedish Crusade against Karelians in 1293. By the beginning of the 14th century, records of independent Finnish military activities ceased to surface.