Analysis of information sources in references of the Wikipedia article "Gwanggaeto the Great" in English language version.
He launched a military expedition to expand his territory, opening the golden age of Goguryeo.
Nevertheless, the reigns of Kwanggaet'o and his successor Changsu (413-491) constituted the golden age of Koguryo.
{{cite book}}: CS1 maint: multiple names: authors list (link)They called their king "taewang" ("the greatest king"). Taewang was a title equivalent to "emperor" and referred to the ruler of the entire world of Goguryeo. In short, the practice of calling their king "taewang" was based on Goguryeo's independent worldview.
He also conquered Sushen tribes in the northeast, Tungusic ancestors of the Jurcid and Manchus who later ruled Chinese "barbarian conquest dynasties" during the twelfth and seventeenth centuries.