 The 1812 Treaty of Bucharest between the Ottoman Empire and the Russian Empires provided for Russian annexation of the eastern part of the territory of the Principality of Moldavia, as well as the Turkish-ruled regions of Khotyn and Budjak (Southern Bessarabia).At first, the Russians used the name "Oblast of Moldova and Bessarabia", allowing a large degree of autonomy, but in 1828 Russia suspended the self-administration and called it the Governorate of Bessarabia, or simply Bessarabia.While the northeastern part of Moldavia, called Bukovina, was similarly annexed by the Austrian Empire, the western part of Moldavia remained an autonomous principality, and in 1859, united with Wallachia to form the Kingdom of Romania.