The 1971 NBA World Championship Series was the championship series played at the conclusion of the National Basketball Association (NBA)'s 25th anniversary season of 1970–71. The Western Conference champion Milwaukee Bucks, who were founded as an expansion team three years earlier, swept the Eastern Conference champion Baltimore Bullets to win their first NBA championship in franchise history, becoming the quickest expansion team to ever win the championship. Baltimore had dethroned the 1969–70 NBA champion New York Knicks in the Eastern Conference finals. This was the first NBA Finals played between two expansion teams. Won the 1971 NBA Finals on April 30, 1971. Wiki link