In the third week of September 1939 Poland underwent its fourth partition: Germany annexed the whole of the Polish corridor, Danzig (for twenty years a free city) included; the province of Poznan; a large slice of Upper Silesia; and a district round Suwalki, at the eastern edge of East Prussia. Lithuania annexed (for a few months, as it turned out) a long strip of territory centring on Vilna (Viln’yus).
—M.R.D. Foot, Resistance, (London: Biteback Publishing Ltd, 2016), 445.