In 1656 Neidenburg was unsuccessfully besieged during the Northern Wars.

Karmėlava was devastated during the Northern Wars.

The duke was taken prisoner by the Swedes from 1658 to 1660, during the Northern Wars.

Lauenburg was occupied by Swedes in the Northern Wars.

The Swedes destroyed the castle and the town in 1656 during the Northern Wars.

The two Northern Wars turned out particularly destructive.

During the Northern Wars (1655-1661), the Lithuanian territory and economy were devastated by the Swedish army.

In 1655, the Swedish army entered the territory of the Duchy and the Northern Wars (1655-1660) began.

Dalregementet was shipped to Pomerania in 1655 following the outbreak of the Northern Wars.

The fortress of Walfisch was destroyed in the year 1717 after the Northern Wars.