After Kudara (Baekje, Paekche) was overthrown in 660, Wakoku fought the Battle of Hakusonko (Battle of Baekgang) against Tang and Shiragi (ancient Korean kingdom) in an attempt to resuscitate Kudara, but ended up in defeat.
660年、百済が滅びると倭国は復興を企図、唐・新羅と白村江の戦いを663年におこなうが、敗れた。