In Poland, German troops captured Kutno west of Warsaw. East of Warsaw, Heinz Guderian's XIX Panzerkorps of Army Group North made contact with XXII Panzerkorps of Army Group South, just to the south of Brest-Litovsk; virtually the whole Polish Army (or what remained of it) was now trapped within a gigantic double pincer. In Russia, Joseph Stalin declared that the government of Poland no longer existed, thus all treaties between the two states were no longer valid; Soviet troops poured across the border to join Germany in the invasion, ostensibly to protect Ukrainian and Byelorussian interests from potential German aggression TH,
