Bastard feudalism as well as recruiting local gentry into their affinities. By offering money instead of land, lords could afford to retain more followers. In return for becoming retainers, the gentry would expect to rely on their lord's influence in local and national politics. This practice was known as "maintenance". The retainer might wear his lord's livery badge or the grander form, a livery collar, which could be very useful in a courtroom. Under a weak king, such as Henry VI (reigned 1422–1461 and 1470–1471), the rivalries of magnates might spill over from the courtroom to armed confrontations, thereby perverting justice. Since
Cham–Vietnamese War (1471) and once their economies recovered, these two kingdoms went to war again. When fighting resumed in 1471, the Champa kingdom found itself weakened and isolated. It has experienced numerous civil wars and, at one point, had five different rulers. For its earlier attack on Angkor, the Khmers ignored the Cham's request for assistance when Vietnam invaded. The Cham also requested Ming China to intervene by helping bring the Vietnamese back in line by force and demarcate the border between Champa and Vietnam. China, however, only verbally rebuked the Vietnamese for its incursion, which the Vietnamese ignored, proceeding with its attack