It was united in 935 and it was united by the silla kingdom.
During the time of the near fall of Tang dynasty in China, WANG KIEN ruled the revolution in Korea and colonized the kingdom of Paekche and Silla.
Silla in 676 CE.
The Three Kingdoms of Korea (Goguryeo, Baekje and Silla) existed from 57 AD until Silla's triumph over Goguryeo in 668. This marked the transition to the North and South States period of Unified Silla in the South and Balhae in the North.
After the Silla kingdom collapsed, the Goryeo kingdom emerged as a dominant power in the Korean peninsula. Goryeo ruled from 918 to 1392 and was known for its advancements in arts, culture, and technology.
The three kingdoms in Korea were named Goguryeo, Baekje, and Silla.
The ancient Korean civilization dates back to around 2333 BCE, traditionally marked by the founding of Gojoseon, the first Korean kingdom. Over the centuries, several other significant states emerged, including the Three Kingdoms of Korea—Goguryeo, Baekje, and Silla—during the first few centuries CE. This period laid the foundation for Korea's cultural and historical development, influencing its society through the ages. The ancient civilization continued to evolve until the unification of Korea under the Silla Kingdom in the late 7th century CE.
Silla did, way back then in the 3 kingdoms period
One of the main kingdoms of Korea that did not develop after colonization by the Chinese Han was the Unified Silla kingdom. The other three main kingdoms that emerged during this period were Goguryeo, Baekje, and Gaya.
The crowns of Silla were made in the Korean kingdom of Silla approximately in the fifth and sixth centuries of the Common Era. Of the ten fully golden crowns in the world, eight are from the Korean Peninsula. Out of these, six are from Silla, and two are from the neighboring Gaya confederacy.[1] These crowns were excavated in Gyeongju, the former capital of Silla, and are designated National treasures of South Korea. The Silla crowns are very fragile and weigh more than one kilogram. The Silla kings probably did not wear the golden crowns like hats. They were probably used only for formal and ceremonial occasions. Some scholars believe that the crowns were never worn at all but made specifically as burial goods.
Korean society has been strongly influenced by Confucianism, Buddhism, and traditional Korean shamanism. These influences have shaped social norms, values, and cultural practices in Korea.
Confucianism and Buddhism