title: The Border Problem in Ukrainian-Russian Relations: History and Present
abstract: The article deals with the main stages of the formation of the territory of the sovereign Ukrai nian state in the 20th century, hence the history of the formation of Ukraine’s borders with neighboring states. Despite the conclusion of interstate agreements, which define the state borders of Ukraine, the authorities of Putin’s Russia, in violation of the norms of international law, in 2014 illegally annexed the Ukrainian Crimea and began armed aggression against Ukraine, which continues to this d
journal: Wschód Europy Studia humanistyczno-społeczne