Page "History of Sweden" Paragraph 18

Sweden's status as an empire did not remain unchallenged.

In the Second Northern War, she was able to establish control of the eastern bank of the Sound, formalized in the Treaty of Roskilde ( 1658 ), and gain recognition of her southeastern dominions by the European great powers in the Treaty of Oliva ( 1660 ); yet, Sweden was barred from further expansion at the southern coast of the Baltic.

That Sweden came out of the Scanian War with only minor losses was largely due to France forcing Sweden's adversaries into the treaties of Fontainebleau ( 1679 ) ( confirmed at Lund ) and Saint-Germain ( 1679 ).