Arthur Davis's final credit as an animator for Warner Bros. cartoons during the original theatrical era. He had left the studio by June 1960, demanding he be released from his contract because fellow animator Phil Monroe had been promoted as supervisor of the commercials unit instead of him. He freelance directed one more cartoon, Quackodile Tears (1962), as a favor to Friz Freleng while he was working at Hanna Barbera. When Freleng and David H. DePatie started DePatie-Freleng Enterprises, he took a job there, directing many Pink Panther shorts.
The title plays on the comic strip 'Prince Valiant'.
Bugs mentions an electric can opener, which was a must-have in kitchens at the time.
Sam, ostensibly a Viking, has an elephant aide for some inexplicable reason. Hannibal of Carthage, who actually crossed the Alps with elephants when he invaded Italy, never got as far as Scandinavia. But, the elephant IS wearing a Roman legionary helmet.
One of the Viking shields on the side of the longboat is the Warner Bros. logo.