Slavs
Slavs are the largest ethno-linguistic group in Europe. Present-day Slavic people are classified into East Slavs (chiefly Belarusians, Russians, Rusyns, and Ukrainians), West Slavs (chiefly Czechs, Kashubs, Moravians, Poles, Silesians, Slovaks and Sorbs), and South Slavs (chiefly Bosniaks, Bulgarians, Croats, Macedonians, Gorani, Pomaks, Montenegrins, Serbs and Slovenes).
Poland–Ukraine relations
Ukraine and Poland are respectively, the second and third largest Slavic countries, after Russia. The two countries share a border of about 529 km. Poland's acceptance of the Schengen Agreement created problems with the Ukrainian border traffic. On July 1, 2009, an agreement on local border traffic between the two countries came into effect, which enables Ukrainian citizens living in border regions to cross the Polish frontier according to a liberalized procedure.