Eventually, in 1965 Vaillant was renamed Pif, due to the popularity of the main character, a dog named Pif.
Vaillant was the only western comic allowed to be distributed in the Soviet Union. Eventually, in 1965 Vaillant was renamed Pif, due to the popularity of the main character, a dog named Pif. Over time after this change, the continuing serials faded, the content slid, and by the end of the 70s it was on its last legs.