 Kọkọ parí gbólóhùn yìí: Lọdún 1807, Kalisz di olú ìlú àgbègbè kan lábẹ Ilẹ Ọba Warsaw. Nígbà tí : Napoleons invasion of Russia, following Yorcks Convention of Tauroggen of 1812, von Steins Treaty of Kalisz was signed between Russia and Prussia in 1813, confirming that Prussia now was on the side of the Allies. Àdéhùn Kalisz tí wọn fọwọ sí láàárín Russia àti Prussia lọdún 1813, jẹrìí sí i pé Prussia wà ní ẹgbẹ àwọn Alátìlẹgbẹ. 