staying in Japan at the time. Imperial Prince Nakano Oe (who later became Emperor Tenji arrived at the Asakura Palace in Isukushi and dispatched a troop of 27,000 in 663 An internal strife arose between Buyeo Pung and Boksin after Buyeo Pung's return to Baekje, however, which led to the death of Boksin at the hands of Buyeo Pung. The Silla troops used that time to conquer Juryu Castle. Japanese troops were decimated by the Tang navy at the mouth of Geum River called Back River (Backchon River, in Japanese historical books). Comprehensitr Mimor for Aid in Gorernment describes this as follows: Four battles were waged against the Japanese forces at the estuary of Back River, all of which were won. Four hundred of their ships were burned;smoke filled the sky and the ocean turned red. Why did Buyeo Pung kill Boksin at such a critical time when national existence was at stake? That is a puzzle. At the time of Pungiang's return, Japan awarded him the government post of Shochukan and married him to the younger sister of Onoomi Komoshiki. If that is the case, even if Backje was revived by the Japanese rein forcement and Buyeo Pung became king, there was a high possibility of Backie becoming a dependent state of Japan. Boksin may have requested the return of Buyeo Pung and the dispatch of Japanese reinforcement, but he probably did not anticipate events to take such a turn. Was his distrust of Buyeo Pung the cause of internal strife? Whatever the case was, King Buyeo Pung of Baekje fled to Goguryeo after the defeat at Baek River, and Princes Chungseung and Chungiwa surrendered with their servants. Many people of Baekje also defected to Japan. The following statements on this issue can be found in the Nihamshoki "around 400 men and women of Baekje were allowed to live in Kanjaki-gun. Omi Province in the year 665" (February of the 4 year of the reign of Emperor Tenji) or "in the year of 669, around 700 men and women including Jwapyeong Yeo Jaiin and Gwisilipsa (8 year of the reign of Emperor Tenji. There is also a record on over 60