It was not easy for people who had been enemies for a long time to come together in a country. However, as the people of Goguryeo and Baekje joined forces with the Silla people to drive out the Tang army, the people gathered together little by little.In addition, the state created a new or changed the Etudeo to govern the broadened territories and the increased number of people. Soon after Goguryeo collapsed, the people of Goguryeo surrendered to Silla, leading a large group of people.King Munmu made them live in Iksan, North Jeolla Province.He wanted to get even a little help to dislodge the Tang army.The remaining nomads lived here and there in the southern part of the country.Silla was granted the right to serve as a government official of Silla or a government official of Goguryeo and Baekje. In particular, they gave good treatment to those who surrendered to Silla and cooperated in fighting the Tang Dynasty.The officials of Baekje and Goguryeo were given government posts to make them loyal to the Silla king The unified Silla army consisted of nine seodang, a central army, and ten local troopsSeodang, the central army, was originally aAfter reunification, Silla divided the country into nine new states.And there were 5 small Seoul places that were important places.In 685, it was equipped with nine weeks and five sceneries.The country moved some of the nobles who lived in the royal palace to Sogyeong.The people of Daegaya and Bodeokguk who were absorbed into Silla were moved to small Seoul. So-gyeong, or small Seoul, was developed into a local cultural center.