After the fall of the eastern parts of the country under Byzantine occupation in 971, he and his three brothers David, Moses and Samuel continued the resistance to the west.
They were called Cometopuli and ruled the country together, as the rightful heirs to the throne, Boris II and Roman were imprisoned in Constantinople.
In the beginning of the major campaign against the Byzantine Empire in 976, the two eldest brothers David and Moses perished but the Bulgarians achieved great successes including the return of north-eastern Bulgaria.
In the end Samuel learned of the secret negotiations and on 14 June 976[citation needed] or 987/988 Aron together with all of his kin were executed in the vicinity of present-day Dupnitsa.
Ivan Vladislav murdered his saviour 39 years later to avenge the death of his innocent siblings, thus usurping the throne and becoming Emperor of Bulgaria.