The fiercest soldier of the border army

Political intrigue + border troops + action + exhilarating read
A modern youth, Tang Shun, is transported to a war-torn era, becoming a lowly soldier on the frontier. Amidst the struggle for supremacy among the seven kingdoms and the suffering of the people, he finds himself crawling through piles of corpses the moment he opens his eyes. 
He was promoted to squad leader for killing enemies and earning merit, and was rewarded with a beautiful woman, but he was ordered to lead nine men to cover the rear and die. 
Starting as a squad leader, he rose through the ranks, feigning weakness to secretly expand his influence, eventually sweeping through towns and counties. 
Holding military power and harboring great ambitions, he quelled internal rebellions while confronting powerful nations. Ultimately, he conquered the seven kingdoms, unified the world, and ascended the throne as emperor. 
A beauty becomes an empress, and her brothers become high-ranking officials—this is how a modern person's journey of revenge against the odds in ancient times becomes legendary.