The 1971 NBA World Championship Series was played at the conclusion of the NBA's 25th Anniversary season of 1970-71. The Western Conference Champion Milwaukee Bucks, who were founded just three years earlier, swept the Eastern Conference Champion Baltimore Bullets in four games. Baltimore had dethroned the 1969-70 NBA Champion New York Knicks to get to their only NBA Finals appearance in Baltimore.
The Bullets were forced to play Game No. 1 on a Wednesday night, just 48 hours after having defeated New York in Game 7 of the 1971 Eastern Conference Finals, then had to wait four days before playing Game 2. The series was the second (and last) time in NBA history that the teams alternated home games, the other being in 1956. Most other series were held in the 2-2-1-1-1 or 2-3-2 format. It was also the last NBA Championship Series completed before May 1.