Baekje fought off many Goguryeo (the northern Korean kingdom) invasions from this fortress, and the 5th king Chogo based his northward campaign on it.
However, in 145, a Silla minister named Gilseon (Korean: 길선; Hanja: 吉宣) failed his coup d'etat attempt and fled to Baekje.
Gaeru gave him refuge despite the Silla king Adalla's written request for his return.
Samguk sagi: During the Spring and Autumn period, when Pu of Chu fled to Lu, Ji Wenzi said, "Seeing one who conducts himself properly toward his lord is like seeing a child who is filial to its father and mother.
Therefore, the peace was lost with neighboring countries, and the king made his people suffer under the burden of attack.