The siege of Danzig took place between 1655 and 1660 when a Swedish force tried to capture this important Baltic Sea port city from the Polish–Lithuanian Commonwealth during the Second Northern War. After 5 years of fighting around Danzig (Gdańsk), the Swedish force which has made little ground surrendered.
Chronology
1655
Swedish naval forces blocked Danzig's harbor – trade was suspended.
Swedish land forces capture the fortress Danziger Haupt (Głowa Gdańska, Danzig Head) – very important water gate on Vistula River
1656, July – Dutch naval forces comes to Gdańsk Bay and unblock Danzig's harbor.