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, having made little progress, surrendered.
== Chronology == 1655 Swedish naval forces blocked Danzig's harbor – trade was suspended. Swedish land forces capture the fortress Danziger Haupt (Głowa Gdańska, Gdańsk Head) – very important water gate on Vistula River 1656, July – Dutch naval forces comes to Gdańsk Bay and unblock Danzig's harbor. 1656, September – Treaty of Elbing: siege lifted due to Dutch intervention 1659, 26 October – Poles defeated the Swedes in a skirmish near Gdańsk Head. 1659, 22 December – Swedish garrison of the fortress Gdańsk Head capitulated. 1660, May – Treaty of Oliva was signed. End of war. Danzig all of that time was unconquered and remain loyal to Polish–Lithuanian Commonwealth.
== References == http://www.zum.de/whkmla/region/eceurope/danzig15571660.html
== Further reading == "Dzieje Gdańska", Edmund Cieślak, Czesław Biernat. Wydawnictwo Morskie Gdańsk, 1969
