Emperor Yang of Sui vs Qin Shi Huang

Emperor Yang ordered the construction of the Grand Canal, linking the Yellow River and Yangtze River basins. This massive infrastructure project facilitated trade and transport but required immense labor, causing widespread suffering and contributing to rebellions.

Emperor Yang launched a massive invasion of the Korean kingdom of Goguryeo with over 300,000 troops. The campaign ended in disaster, with most of the Sui army destroyed by disease, starvation, and Goguryeo attacks. This defeat severely weakened the Sui dynasty.

Emperor Yang launched a second invasion of Goguryeo. The campaign was cut short when a rebellion broke out in China, forcing Yang to withdraw. This further drained the dynasty's resources and morale.

Emperor Yang launched a third invasion of Goguryeo. Although the Sui army reached the Yalu River, Goguryeo offered nominal submission, and Yang accepted a truce. This campaign further exhausted the Sui treasury and military.

Emperor Yang was assassinated by his own guards in Jiangdu (modern Yangzhou) during a rebellion. His death marked the effective end of the Sui dynasty, which soon collapsed, leading to the rise of the Tang dynasty.

Qin Shi Huang commissioned a vast mausoleum complex near Xi'an, guarded by thousands of life-sized terracotta soldiers, horses, and chariots. The project employed hundreds of thousands of workers and reflected his obsession with immortality and imperial power.

From 230 to 221 BCE, Ying Zheng led the Qin state in a series of campaigns that conquered the Han, Zhao, Wei, Chu, Yan, and Qi states. This unified China under a single ruler for the first time, ending the Warring States period.

Qin Shi Huang ordered the standardization of Chinese script, currency, and weights and measures across the unified empire. This facilitated administration, trade, and cultural integration, laying a foundation for future dynasties.

After conquering the last independent state, Ying Zheng declared himself Shi Huangdi (First Emperor), founding the Qin Dynasty. He adopted a new title to signify his supreme authority and initiated centralized imperial rule.

Qin Shi Huang ordered the connection and extension of existing northern fortifications to create a unified defensive wall against nomadic Xiongnu raids. This project involved massive conscripted labor and became the precursor to the later Great Wall.

On the advice of Li Si, Qin Shi Huang ordered the burning of historical records and philosophical texts not aligned with Legalist doctrine. He also had 460 Confucian scholars buried alive to suppress dissent and consolidate ideological control.