By the late 8th century, however, these royal initiatives had failed to check the power of the entrenched aristocracy. The mid to late 8th century saw renewed revolts led by branches of the Gim clan which effectively limited royal authority. Most prominent of these was a revolt led by Gim Daegong that persisted for three years. One key evidence of the erosion of kingly authority was the rescinding of the office land system and the re-institution of the former tax village system as salary land for aristocratic officialdom in 757.