Dae Inseon was king of Balhae

Balhae

Balhae was a Manchurian kingdom established after the fall of Goguryeo. After Goguryeo's capital and southern territories fell to Unified Silla, Dae Jo-yeong, a Mohe general, whose father was Dae Jung-sang, established Jin , later called Balhae.Balhae occupied southern parts of Manchuria and...

, (906 – 926) a kingdom in northeast Asia

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

 occupying parts of Manchuria

Manchuria

Manchuria is a historical name given to a large geographic region in northeast Asia. Depending on the definition of its extent, Manchuria usually falls entirely within the People's Republic of China, or is sometimes divided between China and Russia. The region is commonly referred to as Northeast...

, northern Korea

Korea

Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...

, and the Russian Far East

Russian Far East

Russian Far East is a term that refers to the Russian part of the Far East, i.e., extreme east parts of Russia, between Lake Baikal in Eastern Siberia and the Pacific Ocean...

. Dae Inseon was also the last king of Balhae. He and his armies were pushed back and eventually defeated by the Khitan

Khitan people

thumb|250px|Khitans [[Eagle hunting|using eagles to hunt]], painted during the Chinese [[Song Dynasty]].The Khitan people , or Khitai, Kitan, or Kidan, were a nomadic Mongolic people, originally located at Mongolia and Manchuria from the 4th century...

.

Last moment

His times lied in the rapid point of changing. In case of Silla

Silla

Silla was one of the Three Kingdoms of Korea, and one of the longest sustained dynasties in...

, lots of nobles started to refusing to follow superiors' and rebels gathered all over the territories. Additionally, Tang

Tang Dynasty

The Tang Dynasty was an imperial dynasty of China preceded by the Sui Dynasty and followed by the Five Dynasties and Ten Kingdoms Period. It was founded by the Li family, who seized power during the decline and collapse of the Sui Empire...

 faced serious crisis which was caused by An Lushan

An Lushan

An Lushan was a general who rebelled against the Tang Dynasty in China.His name was also transcribed into Chinese as Āluòshān or Gáluòshān ,...

 and several peasants. Then, Zhu Wen took the foremost position and established Later Liang Dynasty

Later Liang Dynasty

The Later Liang was one of the Five Dynasties during the Five Dynasties and Ten Kingdoms Period in China. It was founded by Zhu Wen, posthumously known as Taizu of Later Liang, after he forced the last emperor of the Tang dynasty to abdicate in his favour...

.

Ae concentrated all the way for enhancing desfensive strength against new superpowers and came to urge new brotherhood - Goryeo Dynasty. However, the outcome was not strong because of continuous conflict among the nobles who just looked for the next thrones eagerly.

But the real matter was the Khitans growing numerous power of Manchuria

Manchuria

Manchuria is a historical name given to a large geographic region in northeast Asia. Depending on the definition of its extent, Manchuria usually falls entirely within the People's Republic of China, or is sometimes divided between China and Russia. The region is commonly referred to as Northeast...

. The Khitans established state called Liao Dynasty

Liao Dynasty

The Liao Dynasty , also known as the Khitan Empire was an empire in East Asia that ruled over the regions of Manchuria, Mongolia, and parts of northern China proper between 9071125...

, which cleared off past namadism and minor peoples' status. Finally, Liao invaded Balhae in 925 and Holhan fortress which had been 5 most important cities during those eras was taken away just after 10 days. In 926, Balhae was collapsed.

Aftermath

Balhae was fully taken over by the Khitan, who established the Dongdan Kingdom

Dongdan Kingdom

Dongdan Kingdom was the puppet kingdom established by the Khitan to rule the realm of the Balhae in Eastern Manchuria....

. The people of Balhae rose together to oppose their new Khitan rulers, and numerous revival movements occurred over a period of a hundred years. The first of these revival movements was Later Balhae

Later Balhae

Later Balhae was established in 927, by the Dae Royal family. It was the first of the immediate successor states to Balhae after its fall to the Khitan in 926...

, which was founded by the Balhae Royal Family.