A boundary marker, border marker, boundary stone, or border stone is a robust physical marker that identifies the start of a land boundary or the change in a boundary, especially a change in direction of a boundary. There are several other types of named border markers, known as boundary trees, pillars, monuments, obelisks, and corners. Border markers can also be markers through which a border line runs in a straight line to determine that border. They can also be the markers from which a border marker has been fixed.
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👉 Border marker in the context of Borders of Russia
Russia, the largest country in the world by area, has international land borders with fourteen sovereign states as well as two narrow maritime boundaries with the United States and Japan. There are also two breakaway states bordering Russia, namely Abkhazia and South Ossetia. The country has an internationally recognized land border running 22,407 kilometres (13,923 mi) in total, and has the second-longest land border of any country in the world, after China (22,457 kilometres (13,954 mi)).
The borders of the Russian Federation (formerly the Russian SFSR) were mostly drawn since 1956 (save for minor border changes, e.g., with China), and have remained the same after the dissolution of the Soviet Union. In 2014, Russia annexed Ukraine's Crimean peninsula and parts of Donetsk and Luhansk oblasts in a move that remains internationally unrecognized, but which altered de facto borders with Ukraine. In 2022, Russia further annexed Donetsk, Kherson, Luhansk and Zaporizhzhia oblasts further changing de facto borders with Ukraine.