Complex sentence: Within the martial arts community, Peterson and SCARS have been subject to controversy accusations have also been levelled at Peterson about sensationalistic and misleading advertising about SCARS, often involving cliams of how widely the system has been taught in the Navy.
Split into simpler sentences: Within the martial arts community, Peterson and SCARS have been subject to controversy. Accusations have also been levelled at Peterson about sensationalistic and misleading advertising about SCARS, often involving cliams of how widely the system has been taught in the Navy.