The Panther was a German medium tank deployed during World War II on the Eastern and Western Fronts in Europe from mid-1943 to its end in 1945. It had the ordnance inventory designation of Sd.Kfz. 171. Until 27 February 1944, it was designated as the Panzerkampfwagen V Panther when Hitler ordered that the Roman numeral “V” be deleted. Contemporary English language reports sometimes refer to it as the Mark V.
Additional Information: en.wikipedia.org/wiki/Panzerkampfwagen_V_Panther