For 10 points, name this Baltic nation with capital Vilnius.
The Annals of Quedlinburg claim that Bruno of Querfurt converted a king of this country named Nethimer. Residents of this country's highland regions are called AukÂštaitians, whose dialect is the basis for this country's modern standard language. Treniota led its Samogitian people to victory against the Livonian Order at the Battle of Durbe, and convinced his uncle (*) Mindaugas to relapse from Christianity. The Peace of Thorn was concluded between the Teutonic Knights and a national hero of this country, Vytautas, who had earlier ended a civil war here by making peace with its Grand Duke, Jogaila. Jogaila's marriage to a neighboring country's Queen Jadwiga linked this country to Poland in a Commonwealth. For 10 points, name this Baltic nation with capital Vilnius.
The Annals of Quedlinburg claim that Bruno of Querfurt converted a king of this country named Nethimer.
Lithuania [or Lietuva]