Answer: Goguryeo.
Some extra relevant information:
The three kingdoms of Korea were Baekje, Silla, and Goguryeo. These three kingdoms played a significant role in shaping the history and culture of the Korean peninsula.
Baekje was one of the three kingdoms that existed during the Three Kingdoms period of Korea, which lasted from the 1st century BCE to the 7th century CE. Baekje was located in the southwestern part of the Korean peninsula, with its capital at present-day Seoul. It was known for its maritime power and cultural exchange with other countries, particularly China.
Silla was another prominent kingdom during the Three Kingdoms period. It was situated in the southeastern part of the Korean peninsula, with its capital at present-day Gyeongju. Silla is well-known for its unification of the Korean peninsula under the Unified Silla dynasty in 676 CE. This dynasty lasted for nearly a millennium and is often regarded as a golden age in Korean history.
Goguryeo was the third kingdom, and it was situated in the northern part of the Korean peninsula and parts of Manchuria. It had its capital at present-day Pyongyang. Goguryeo was renowned for its military prowess and engaged in frequent conflicts with its neighboring kingdoms, particularly Silla and Baekje. Despite facing numerous challenges, Goguryeo managed to retain its independence until its eventual downfall in 668 CE.
These three kingdoms were not only known for their individual achievements but also for their fierce rivalries and alliances. They competed for territory, resources, and influence, resulting in a complex and dynamic political landscape. The conflicts and interactions between these kingdoms had a significant impact on the subsequent development of Korean history.
The heritage of these kingdoms can still be observed in modern-day South Korea. Many historical sites, artifacts, and cultural traditions are preserved to showcase the rich history and achievements of Baekje, Silla, and Goguryeo. Exploring the legacy of these kingdoms offers valuable insights into the early periods of Korean civilization.