Polish Executive Committee in Rus
Polish Executive Committee in Rus (Ruthenia) (Polish: Polski Komitet Wykonawczy na Rusi, Ukrainian: Польський комітет виконавчий на Русі) was a Polish representative body in Ukraine created on 6 March 1917 at the Kiev Congress of Polish Communities on the initiative of NDs (liberals) and the Polish Socialist Association (PSO). Abbreviated as PKW na Rusi, it was headed by Joachim Bartoszewicz. PSO was created on 3–4 March 1917 in Kharkiv headed by T. Żarski.
These political associations, the declared tactic of which was quite contrary, at the same time consisted of different centers of one party. PSO in Kharkiv was created by former members of the PPS-FR and also included representatives of the PPS-L and the SDKPiL, while Kiev members of the PPS-FR led by Kazimierz Domosławski were more supportive of the PKW. Despite that none of the centers considered itself representative of the one PPS-FR.