The blockade of Strasburg occurred from October to 10 December 1659 during the Second Northern War. A PolishâÂÂBrandenburgian force under the command of Henryk Denhoff and Bogusà Âaw Radziwià Âà  respectively approached the city in October, cutting off supplies and reinforcements. This forced the commander of the 100 strong Swedish garrison, Johann Pleitner, to surrender. While initially promised free departure to Elbing, he and the survivors were later rounded up by Radziwià Âà  and made into prisoners of war.
In October 1659, a Polish force consisting of one infantry regiment and several banners of cavalry under the command of Henryk Denhoff blockaded Strasburg in Ducal Prussia. This blockade was supported by some Brandenburgian units under the command of Prince Bogusà Âaw Radziwià Âà Â. The Swedish garrison inside the city consisted of 100 men under the former fortification officer, Colonel Johann Pleitner. Pleitner had previous experience in siege warfare. Despite this, Strasburg was soon cut off from supplies and reinforcements. This led to his surrender on 10 December in exchange for being allowed departure to Elbing.
Despite the surrender agreement confirming free departure, Radziwià Âà  did not feel bound by the terms, deciding to round up the surviving Swedes and made them prisoners of war.