By 17 September, the Polish defence had already been broken and the only hope was to retreat and reorganize along the Romanian Bridgehead. However, the plans were rendered obsolete nearly overnight when the over 800,000-strong Soviet Red Army entered and created the Belarusian and Ukrainian fronts after they had invaded the eastern regions of Poland, in violation of the Riga Peace Treaty, the Soviet–Polish Non-Aggression Pact, and other international treaties, both bilateral and multilateral. Soviet diplomacy had lied that they were "protecting the Ukrainian and Belarusian minorities of eastern Poland since the Polish government had abandoned the country and the Polish state ceased to exist".