Original: Montreal was awarded the rights to the 1976 Games on May 12, 1970, at the 69th IOC Session in Amsterdam, over the bids of Moscow and Los Angeles, which later hosted the 1980 and 1984 Summer Olympic Games, respectively.
Simplified: Montreal was awarded the rights to the 1976 Games in May 1970 over the bid of Moscow and Los Angeles, who later hosted the 1980 and 1984 Summer Olympic Games respectively.