Game of Thrones Overlord Conquest

12,000 years ago, the ancestors came to Westeros from the Eastern Continent. Their faith triggered a war with the indigenous Children of the Forest. The two sides swore that the forest belonged to the Children of the Forest, and the rest of Westeros belonged to the ancestors.
6,000 years ago, the Andals invaded Westeros from the eastern continent and conquered the southern continent.
300 years ago, the Valyrian conqueror Aegon Targaryen set out from the eastern continent to conquer Westeros.
Now, the Supreme Khal, the conqueror of the Eastern Continent—Meng Ge Khal,
Leading the Dothraki across the Narrow Sea, he asked if he could claim the title of King of the Andals, the Rhoynar, and the First Men, Ruler of the Seven Kingdoms, and Protector of the Realm.