[citation needed] The fortress is valuable because it shows what building techniques were employed by the Silla during the late fifth century.

The fortress occupied and protected a strategic location and is credited with helping Silla to achieve the unification of Korea.

During the late seventh century, Silla used the fortress as a base to attack Baekje to the west while also preparing for advances against Goguryeo to the north.

[3] The fortress was pivotal in securing the Han River Valley, the central part of the Korean peninsula.

Excavations in 1983 of artifacts from the Three Kingdoms period up to the Joseon dynasty give clues as to when the fortress was occupied and used.

Another notable feature of the fortress is the presence of engraved calligraphy on a boulder at its entrance, writing that has been attributed to Kim Saeng.