One was Greater Wallachia (Muntenia) and the other was Lesser Walachia (Oltenia). There was also the disputed province of Dobruja.
These provinces were mostly geographical, not administrative, but from the end of the 15th century, because the Banate of Severin was partitioned between Wallachia and the Kingdom of Hungary, Oltenia was ruled by a ban. Oltenia was known as the Banate of Craiova.