Belarus–Ukraine relations
Belarus–Ukraine relations (, "Byelaruska-ŭkrainskiya adnosiny", , "Ukrains'ko-Bilorus'ki vidnosyny", , "Belorussko-ukrainskiye otnosheniya") are foreign relations between Belarus and Ukraine. Both countries were successively ruled by the Polish-Lithuanian Commonwealth, the Second Polish Republic, and ultimately, the Russian Empire. Prior to the 1991 breakup, both countries were part of the Soviet Union as the Belarusian SSR and Ukrainian SSR when they were the founding members of the United Nations in 1945. Being Slavic nations, both Belarus and Ukraine share closely related cultures and are predominantly inhabited by the East Slavic ethnic groups of Belarusians and Ukrainians respectively, along with a few Russians. Today, the two countries share an 891–km border.
Historiography in the Soviet Union
Soviet and earlier Slavophile historians emphasized the Slavic roots in the foundation of the Russian state in contrast to the Normanist theory of the Vikings conquering the Slavs and founding the Kievan Rus'. They accused Normanist theory proponents of distorting history by depicting the Slavs as undeveloped primitives. In contrast, Soviet historians stated that the Slavs laid the foundations of their statehood long before the Norman/Viking raids, while the Norman/Viking invasions only served to hinder the historical development of the Slavs. They argued that Rus' composition was Slavic and that Rurik and Oleg' success was rooted in their support from within the local Slavic aristocracy. After the dissolution of the USSR, Novgorod acknowledged its Viking history by incorporating a Viking ship into its logo.