The Northern War (1655-1661) was a series of conflicts between Sweden and its adversaries Poland (The Deluge, 1655-1660), Russia (1656-1661), Brandenburg-Prussia (1657-1660), the Holy Roman Empire (1657-60) and Denmark (1657-1658, 1658-1660).
Peace Treaties
Note: Not to be confused with the Great Northern War (1700-1721)
See also: List of Swedish wars