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

• Treaty of Roskilde with Denmark (February 26 1658)
• Treaty of Oliva with Poland (April 23, 1660)
• Treaty of Copenhagen with Denmark (May 27 1660)
• Treaty of Kardis with Russia (June 21 1661)