Nine Nations Union is the alliance of the nations who try to stop the invasions of the Moulan Race.
There is a late Nascent Soul cultivator in the Nine Nations Union, the Six Devil Dao Sects and the Righteous Dao Alliance, each only a step away from entering Deity Transformation stage. This is how each of the three superpowers remain on equal footing. As for Heavenly Dao Alliance, they have two mid Nascent Soul-stage Dao Companions that are proficient in cooperative techniques.
The Union is located at the south of the Heavenly South Region.
War between the 7 Sects of Yue and the 6 Devil Dao Sects
Remains of the Six Sects of the State of Yue took refuge in the Nine Nations Union. They contended with the local sects and established a new foothold. They also were forced to battle Moulan Tribe's Spell Soldiers.
Moulan invasion of the Heavenly South
Nine Nations Union created a joint pact against the Moulan with Six Devil Dao Sects, Righteous Dao Alliance and Heavenly Dao Alliance. They often requested reinforcements from other three superpowers. This led to peace in the Heavenly South Region.
After about 100 years, Moulan tribes launched an invasion. The Nine Nations Union was caught unprepared by the attack. Because of the overbearing assault of the Moulan, the forces of the Nine Nations Union had suffered vast losses three times in a row. They had no choice but to rely on many grand spell formations to difficultly protect their vital strategic locations. Moulan invasion was far different from the ones in the past. Not only did their spell warriors have far better training, they were using ancient, ferocious beasts.
After winning at the Yellow Dragon Mountains, 3 Divine Sages led the army towards the Soaring Heavens City. Wei Wuya, the great cultivator of the Nine Nations Union, was able to hold back the city with its grand formation for a month. However, the combined might of 3 Divine Sages, a few black-robed cultivators, and 8 giant beasts broke the formation and the city had fallen. Reinforcements from the Righteous Dao Alliance, Six Devil Dao Sects and the Heavenly Dao Alliance had arrived and stopped further progress at the border between States of Yu and Beiliang. Skyfirst City was built as a new stronghold, and more Moulan tribes sent their elite on the front.
The final battle involved hundreds of thousands of cultivators. Long Han served as the commander of the Heavenly South Army and Divine Sage Zhu commanded the army of spell warrior. Wei Wuya fought one of other Divine Sages. Many disciples from sects from Six Devil Dao Sects, Righteous Dao Alliance or Heavenly Dao Alliance participated. Before the culmination, Moulan received news about the attack of Soaring Tribes. Both sides stopped fighting. With peace talks against the common enemy, Moulan got 2 countries near the border, and the Nine Nations Union was compensated with other territories.