Bayanchur Khan vs Yang Jian

Bayanchur Khan consolidated Uyghur control over the former Gokturk territories, establishing the Uyghur Khaganate as the dominant steppe power. He built a capital at Ordu-Baliq and organized the Uyghur state on a model combining steppe traditions with Chinese administrative practices.

Bayanchur Khan led campaigns against the Kyrgyz and Karluk tribes to secure the northern and western borders of the Uyghur Khaganate. He defeated these groups and incorporated them into the Uyghur confederation, expanding Uyghur territory.

Bayanchur Khan sent Uyghur cavalry to aid the Tang dynasty in suppressing the An Lushan Rebellion. The Uyghur forces helped recapture the Tang capital Chang'an and Luoyang, cementing the Uyghur-Tang alliance.

Yang Jian, as regent of Northern Zhou, led a campaign to conquer the rival Northern Qi state. He defeated the Northern Qi army and annexed its territory, unifying northern China under Northern Zhou rule.

Yang Jian forced Emperor Jing of Northern Zhou to abdicate and proclaimed himself emperor, founding the Sui Dynasty. This ended the Northern Zhou and began the Sui Dynasty, which would later reunify all of China.

Yang Jian implemented the equal-field system (juntian) across the Sui Empire, redistributing land to peasants and reducing the power of aristocratic families. This reform increased agricultural productivity and tax revenue, strengthening the central government.

Yang Jian launched a massive invasion of the Chen Dynasty in southern China. His forces captured the Chen capital Jiankang (Nanjing), ending the Chen Dynasty and reunifying China after nearly 300 years of division since the fall of the Han.