Polish–Swedish War (1621–1625)

The Polish–Swedish War (1621 to 1625) was one in a series of conflicts between the Polish–Lithuanian Commonwealth and Sweden during the first half of the 17th century. It began in August 1621, when Gustavus Adolphus of Sweden invaded the Commonwealth territory of Livonia and captured Riga, one of the wealthiest and most important ports in Europe.

Source: Wikipedia — Polish–Swedish War (1621–1625) (CC BY-SA 4.0)