Mandala is a significant Canadian rhythm and blues band that was active from 1965 to 1969. The group was known for its soulful, powerful sound, led by the distinctive vocals of George Oliver and later, Roy Kenner. They gained popularity with their 1966 hit single, "Opportunity," which was influential in the Toronto Sound of the 1960s. Despite their relatively brief existence, Mandala's unique blend of R&B and rock laid the groundwork for future Canadian artists in these genres.