Treaty of Warsaw
Despite Entente mediation attempts to cease hostilities and reach a compromise between belligerents the Polish–Ukrainian War continued until July 1919 when the last UHA forces withdrew east of the River Zbruch. The border on the River Zbruch was confirmed at the Treaty of Warsaw, when in April 1920 Field Marshal Pilsudski signed an agreement with Symon Petlura where it was agreed that for military support against the Bolsheviks the Ukrainian People's Republic renounced its claims to the territories of Eastern Galicia.