Ustalenie granicy polsko-sowieckiej – w 100. rocznicę delimitacji granicy ryskiej

The end of World War I brought the issue of the borders of the reborn Poland on the agenda. Their shaping was a long and dramatic process. Among the numerous disputes and conflicts, the Polish-Russian war occupies a special place. Its effect was the defense of the reborn state and the establishment of the eastern border of Poland. The war began in February 1919. However, it ended with the signing of the preliminary treaty on October 12, 1920, and the peace treaty on March 18, 1921 in Riga. The peace treaty eliminated the state of war and established the border line between Poland and Russia, Belarus and Ukraine. Its precise delimitation in the field and placing border marks on it was carried out by a special mixed border commission consisting of two delegations - Polish and Russian-Ukrainian-Belarusian. The content of this article is an attempt to look at one of the most important events in the modern history of Poland from the perspective of 100 years, which was the establishment and guidelines of the eastern border of Poland by a mixed border commission. The aim of the paper is to present the work of the committees which took place in an atmosphere of constant dispute and conflicts between representatives of the delegations of both countries. Both parties repeatedly threatened to terminate or suspend the works. Due to the volume framework, it is not possible to fully characterize the archival sources and the published publications. It could be a topic of a separate study. I hope that the bibliography attached to the article will help to provide a thorough and comprehensive presentation of the topic.