Dan I was a ruler of the principality of Wallachia, (circa 1383 - 1386). A principality is a monarchical feudatory or sovereign state, ruled or reigned over by a Monarch with the title of prince or princess (a synonym is princedom) or (in the widest sense) a Monarch with another title within the generic use of the term prince. ... Map of Romania with Wallachia in yellow. ... Events End of the reign of Emperor Chokei of Japan Emperor Go-Kameyama ascends to the throne of Japan Births Pope Eugenius IV Deaths March 1 - Amadeus VI of Savoy, Count of Savoy (b. ... Events Battle of Sempach: Swiss safeguard independence from Habsburg rule End of reign of Poland by Capet-Anjou family. ...