Yamataian Ekuni

Yamataian Ekuni (大山都江国) was a colonial state that was a part of Imperialist Yamatai.

Yamataian Ekuni was created after the Song Empire was annexed by Yamatai following the Nhâm Thìn War and the Treaty of Cẩm Phả. After Yamatai's victory over Myaar'tway in the XXX War, Yamataian Ekuni would later be consolidated with subjugated Myaar'tway under Yamataian Nanyōkuni, laying the foundations for modern day Dai Hoa.

Etymology
Ekuni (江国) is the Yashiman reading of the characters that make up the Song civilisation's name. Song people used to be called Ejin, which is today considered highly offensive. They are now called Songjin or Hoajin in Yashiman.

History
Yamatai had already begun trading with the Song Empire since the 16th century, with a trading post in Tuấn Hà established in 1593. Yamatai began spreading its influence throughout the region, deploying advisors and trade missions throughout Dai Hoa.

The Yamataian victory over the Songese in the 1764 Battle of Vạn Ninh consolidated Yamatai's power in the region, forcing the Song Emperor to cede Hương Đất Province, including the cities of Cẩm Phả and Tuấn Hà (aka Nha Trang) to Yamataian control. Over the next decade, Yamatai aggressively expanded its territory by purchasing land from the ailing Song monarchy as well as offering these governors rewards and governmental positions for joining the Yamataian colony. The weakened Songese Court was unable to respond adequately, prompting the Đen Đai Rebellion by the Songese military.

Taking this opportunity to expand their control over the Crosswind region, Yamatai carried out an intervention into the Song Empire to protect the Song monarchy, beginning the Nhâm Thìn War in 1773. Following the Yamataian victory in the war in 1975, the Treaty of Cẩm Phả formalised the Song Empire's annexation into the Yamataian Empire, with the Song Emperor retained as a figurehead ruler with a Yamatai-controlled administration.