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Instead of marching on Wehlau, as was expected, he ordered his forces to cross the Pregel River in safety, near the village of Gross-Jägersdorf (Abandoned in 1945 and away 5 km southwest from Mezhdurechye (Norkitten) and placed on municipality of Svoboda (Jänischken, Jänichen between 1938–1945) in Chernyakhovsky District).
The city of Königsberg in Prussia (now Kaliningrad, Russia) was set on both sides of the Pregel River, and included two large islands which were connected to each other and the mainland by seven bridges.