By the end of July the Paris Peace Conference gave the city to Poland and the Lithuanians left the city , but some of the Polish lands were left on the Lithuanian side of the border while several Lithuanian villages were left on the Polish side of the border . By the end of July the Paris Peace Conference granted the town to Poland and the Lithuanians withdrew from the town , but some of the Polish-inhabited lands were left on the Lithuanian side of the border while several Lithuanian villages were left on the Polish side of the so-called Foch Line .