After First World War, Dmowski and Pilsudski claimed to form legitimate government in Poland.
Explanation:
There war fear that Civil war can outbreak if Dmowski and Pilsudski does not put their differences aside. Paderewski tried to compromise between two, in which he and Dmowski were represented Versailles conference (Paris peace conference) whereas Pilsudski served as provisional president of Poland.
At the Versailles conference, Roman Dmowski impacted treaty’s favorable decisions towards Poland. Dmowski presented five hour presented with allies Supreme War council. Dmowski claimed little interest towards Ukraine and Lithuania. However he strongly claimed Polish speaking Territory taken by Prussia