Leon Tomșa, also known as Leon Vodă or Alion, was the Prince of Wallachia from October 1629 to July 1632. He claimed to be a son of Ștefan IX Tomșa, and as such a Moldavian, but was generally identified as a Greek of lowly origins, and reportedly an oyster-monger. He was imposed on the throne by the Ottoman Empire, one of a line of Princes who were primarily subservient to Ottoman power. In his first year, he also supported the political ascendancy of Greeks and Levantines, many of whom made their way into Wallachia's traditional aristocracy, or boyardom. This upset the local boyars, who were further alienated and impoverished by Leon's fiscal policies, which in turn reflected Ottoman demands for tribute. The regime was threatened by an Oltenia-centered rebellion, initially led by Ban Aslan, and later by Matei Basarab. Though often depicted as an anti-Greek movement, it had Greeks and Romanians fighting on either side.

The Early Modern Times in Romania started after the death of Michael the Brave, who ruled in a personal union, Wallachia, Transylvania, and Moldavia – three principalities in the lands that now form Romania – for three months, in 1600. The three principalities were subjected to the Ottoman Empire, and paid a yearly tribute to the Ottoman Sultans, but they preserved their internal autonomy. In contrast, Dobruja and the Banat were fully incorporated into the Ottoman Empire.