During the Napoleonic Era, Budjak was overrun by Russia in the course of the Russo-Turkish War of 1806–1812. The 1812 Treaty of Bucharest transferred the territories of Moldavia and Ottoman Empire east of the Prut River, including Budjak, to Russian control. With the Russian annexation, the name Bessarabia began to be applied not only to the original southern region, but to the entire eastern half of historical Moldavia acquired by the Russian Empire, while Budjak was applied to southern Bessarabia, mainly to the steppe.