Charles XII of Sweden, exiled to Bender in the Ottoman Empire between the Surrender at Perevolochna and his return in 1714, had envisioned that Stralsund would constitute the base of a renewed Swedish attack on Peter the Great. Charles XII's plans foresaw a two-fold assault of a Swedish army from Pomerania and a Turkish army from the South. When Charles XII reached Stralsund in November 1714, the town's garrison was reinforced to a strength of 17,000 men. Searching for allies, Charles XII also negotiated with Prussia, but was unwilling to meet Frederick William I's demands on Stettin and 400,000 reichstalers in tribute. In April 1715, Königsberg declared war.