The conversation between human and AI assistant.
How different was the map of Prussia in 1914 compared to today?
What parts of East Prussia were lost to Poland and Lithuania?
The northern part of East Prussia, including the city of Königsberg (now Kaliningrad), was ceded to the Soviet Union, while the southern part of the region, including Allenstein and Marienwerder, was transferred to Poland. The Memel Territory, which had been part of East Prussia, was given to Lithuania.