No Wallachia is on the other side of the Carpathians, from the circled parts Transylvania and Partium are parts of Romania at the moment. Wallachia was occupied by Hungary for a very little time in the middle ages, and lastly in 1918 for some months: en.wikipedia.org/wiki/Treaty_of_Bucharest_(1918), quickly overturned in the Hungarian Romanian war of 1919: en.wikipedia.org/wiki/Hungarian–Romanian_War