Tensions between the two resulted in the outbreak of the Korean War in 1950.
With involvement by foreign troops, the war ended in a stalemate in 1953, but without a formalized peace treaty.
"Great Joseon" was the name of the kingdom ruled by the Joseon dynasty from 1393 until their declaration of the short-lived Great Korean Empire in 1897.
King Taejo had named them for the earlier , the Han dynasty defeated Gojoseon and installed four commanderies in the northern Korean peninsula.
Goryeo, which had succeeded Goguryeo, defeated the two other states and united the Korean Peninsula.
Around the same time, Balhae collapsed and its last crown prince fled south to Goryeo.Korea emerged as a singular political entity in 676 AD, after centuries of conflict among the Three Kingdoms of Korea, which were unified as Unified Silla to the south and Balhae to the north.Unified Silla divided into three separate states during the Later Three Kingdoms period.In response, Emperor Tang Taizong of China led a campaign against Goguryeo, but was defeated and retreated.After the death of Tang Taizong, his son Emperor Tang Gaozong allied with the Korean kingdom of Silla and invaded Goguryeo again, but was unable to overcome Goguryeo's stalwart defenses and was defeated in 662.In 1945, the Soviet Union and the United States agreed on the surrender of Japanese forces in Korea in the aftermath of World War II, leaving Korea partitioned along the 38th parallel. These circumstances soon became the basis for the division of Korea by the two superpowers, exacerbated by their incapability to agree on the terms of Korean independence.The North was under Soviet occupation and the South under U. The Communist-inspired government in the North received backing from the Soviet Union in opposition to the pro-Western government in the South, leading to Korea's division into two political entities: North Korea (formally the Democratic People's Republic of Korea), and South Korea (formally the Republic of Korea).With the fall of Gojoseon, southern Korea entered the Samhan period.Located in the southern part of the Korean Peninsula, Samhan refers to the three confederacies of Mahan, Jinhan, and Byeonhan. Byeonhan and Jinhan both consisted of twelve states, bringing a total of 78 states within the Samhan.It has been tentatively linked with the title khan used by the nomads of Manchuria and Central Asia.In North Korea, China, Vietnam and Japan, Korea as a whole is referred to as "[land of the] Morning Calm").