Slavs
Slavs can be further grouped by religion. Orthodox Christianity is practiced by the majority of Slavs. The Orthodox Slavs include the Belarusians, Bulgarians, Macedonians, Montenegrins, Russians, Serbs, and Ukrainians and are defined by Orthodox customs and Cyrillic script as well as their cultural connection to the Byzantine Empire (Serbs also use Latin script on equal terms). Their second most common religion is Roman Catholicism. The Catholic Slavs include Croats, Czechs, Kashubs, Moravians, Poles, Silesians, Slovaks, Slovenes, and Sorbs and are defined by their Latinate influence and heritage and connection to Western Europe. There are also substantial Protestant and Lutheran minorities especially amongst the West Slavs, such as the historical Bohemian (Czech) Hussites.
Eastern Ukraine
Eastern Ukraine or East Ukraine (, "Skhidna Ukrayina"; , "Vostochnaya Ukraina") generally refers to territories of Ukraine east of the Dnieper river, particularly Kharkiv, Luhansk and Donetsk oblasts. Dnipropetrovsk and Zaporizhia Oblasts sometimes are also regarded as Eastern Ukraine. In regard to traditional territories the area encompasses portions of the southern Sloboda Ukraine, Donbas, the western Azov Littoral (Pryazovia).