King Jinheung
Twenty-fourth king of Silla, who took the Han River basin and Daegaya, raised border steles and organized the hwarang
In 551 he joined King Seong of Baekje against Goguryeo and won the upper Han River, then in 553 seized the lower Han that Baekje had recovered and set up Sinju Province there. This broke the Silla–Baekje Alliance, and King Seong was killed at the Battle of Gwansan Fortress in 554. Control of the Han basin opened a direct route to China through Danghangseong. In 562 he sent Isabu to conquer Daegaya, and he raised the Jeokseong stele at Danyang and border steles at Bukhansan, Changnyeong, Hwangchoryeong and Maunryeong. He had Geochilbu compile the Guksa in 545, built Hwangnyongsa and used the era names Gaeguk, Daechang and Hongje. In 576 he abolished the wonhwa and made the hwarang a state institution.