What only a handful of people knew was that Sonneillon BM started playing in 2008 and was founded in this year by Bellerophon and currently had gained lots of new inspiration to make a debut album, and so Legion Portuguese Mountain Cult was created.The first official EP and demo tape was released in 2008/09. Sonneillon BM's intention was to create their own style of furious form of Black Metal, and continue that for the time of the band's existence. The line-up has had several changes since its inception, but Bellerophon (the founder) has always been part of the band, and has also been the main composer of the music, throughout time. This has led to their distinctive and original maniac sound. And then after these changes Bellerophon decided to invite guest session members and friends because since the modifications in the first band line up and over the years, many line up alterations have not been supported with members with the same feeling, so now warriors, musicians, support, and sometimes a warrior also in composition, earn their place to follow Sonneillon BM's creative process in live performances. And Uncompromising Black Metal.