Gaeru of Baekje

Gaeru of Baekje
Hangul	개루왕
Hanja	蓋婁王
Revised Romanization	Gaeru-wang
McCune–Reischauer	Kaeru-wang

Monarchs of Korea Baekje

Onjo 18 BCE–28 CE Daru 28–77 Giru 77–128 Gaeru 128–166 Chogo 166–214 Gusu 214–234 Saban 234 Goi 234–286 Chaekgye 286–298 Bunseo 298–304 Biryu 304–344 Gye 344–346 Geunchogo 346–375 Geungusu 375–384 Chimnyu 384–385 Jinsa 385–392 Asin 392–405 Jeonji 405–420 Guisin 420–427 Biyu 427–455 Gaero 455–475 Munju 475–477 Samgeun 477–479 Dongseong 479–501 Muryeong 501–523 Seong 523–554 Wideok 554–598 Hye 598–599 Beop 599–600 Mu 600–641 Uija 641–660

Gaeru of Baekje (died 166, r. 128–166) was the fourth king of Baekje, one of the Three Kingdoms of Korea. According to the history compilation Samguk Sagi, he was the son of the previous king Giru.

In 132, he founded Bukhansanseong in present-day Goyang city, Gyeonggi, South Korea. Baekje fought off many Goguryeo (the northern Korean kingdom) invasions from this fortress, and the 5th king Chogo based his northward campaign on it.

Baekje's relationship with the southeastern rival Silla was peaceful for most of his period of reign.

However, in 165, a Silla minister named Gilseon (길선/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. Silla subsequently attacked Baekje, and a broad war over the Sobaek Mountains ensued.

The Samguk Sagi states that Gaeru's eldest son became the 5th king Chogo and the second son became the 8th king Goi. This chronological inconsistency is thought to indicate a power struggle between two royal lines. The 21st king Gaero (also known as Geungaeru) apparently took Gaeru's name to assert the legitimacy of this.

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