<Tr> <Th> Western Finals </Th> <Td> Bucks defeat Lakers, 4--1 </Td> </Tr> <Tr> <Td_colspan="2"> <1970 NBA Finals 1972> </Td> </Tr> <P> 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 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 . </P> <P> The Bucks were the first Western Conference champions to win the league's finals since the St. Louis Hawks did so in 1958 . </P>

When did the milwaukee bucks win the nba championship