In the 17th century, Sweden was a major European power and controlled most of the Baltic coast. However, its expansion in the Baltic Sea coastlands antagonized Russia, Denmark-Norway, and Saxony-Poland, which formed an anti-Swedish coalition. The resultant Great Northern War cost Sweden much of its territory and marked the emergence of Russia as a major power. After Russia and Sweden clashed again in the 19th century, the 1809 Treaty of Fredrikshamn forced Sweden to cede all of what country? Discuss