What makes The Dragon by Vangelis notable?

'The Dragon' is significant as one of the early examples of electronic music that incorporates progressive rock influences. Though it did not achieve commercial success, it contributed to Vangelis' reputation as a pioneer in electronic music and helped influence subsequent artists in the genre. Released in 1971, 'The Dragon' marked Vangelis' debut solo album after his departure from the band Aphrodite's Child. At this point in his career, he was transitioning from pop music to exploring the realms of ambient and electronic composition, laying the groundwork for his future work in film scoring.