On June 25, 1919, the Allied Council legitimized Polish control over Eastern Galicia through the resolution that approved military occupation by Polish forces, including Haller's Army, up to the river Zbruch and authorized the Polish government to establish an interim civil administration, which would preserve as far as possible the territorial autonomy and liberties of the inhabitants. On November 21, 1919, the Highest Council of the Paris Peace Conference granted Eastern Galicia to Poland for a period of 25 years, after which a plebiscite was to be held there, and obliged the Polish government to give territorial autonomy to the region. This decision was suspended on 22 December 1919 and never implemented. On April 21, 1920, Józef Piłsudski and Symon Petliura signed an alliance, in which Poland promised the Ukrainian People's Republic the military help in the Kyiv Offensive against the Red Army in exchange for the acceptance of Polish–Ukrainian border on the river Zbruch.