After the Mongol invasion of Europe, the Bukovina lands since the 14th century had been part of the Principality of Moldavia, with Suceava being the princely capital from 1388 to 1565. In the 16th century, Moldavia came under Ottoman influence, but still retaining its autonomy. During the early 18th century, Moldavia became the target of the Russian Empire's southwards expansion, inaugurated by Tsar Peter the Great during the Pruth River Campaign of 1710–11. In 1769, during the Russo-Turkish War of 1768–74, Moldavia was occupied by Russian troops.