Introduce the history of Sweden, a Nordic country.

This country began to take shape around 1 100. 1 157 annexed Finland. 1397 forms the Kalmar Union with Denmark and Norway, and is ruled by Denmark. 1523 independence from the alliance. In the same year, Gustav Vasa was elected king. The period from 1654 to 17 19 was a prosperous period in Sweden, and its territory included Finland, Estonia, Latvia and Lithuania, as well as the Baltic coastal areas of Russia, Poland and Germany. 17 18 gradually declined after losing the wars against Russia, Denmark and Poland. 1805 Participated in the Napoleonic Wars. /kloc-After losing to Russia in 0/809, it was forced to cede Finland. 18 14 obtained Norway from Denmark and made an alliance with Norway. Norway became independent from the Federation. Sweden remained neutral in both world wars.