Thanks for Asking: I'm in the Great Tang, Cutting My Way from West to East

[System] + [summoning] + [Anxi Army] + [overpowered protagonist] + [unifying the world]

A lone city, a few hundred battered troops, and tens of thousands of Tibetan cavalry bearing down on them: how long can Yanqi hold out?

Lin Paisen, a modern history buff, wakes up to find himself on a battlefield. Yanqi is about to fall, and fewer than two hundred Tang soldiers remain!

He doesn’t want to die, and he can’t go back. His only choice is to carve out a path through this chaotic age!

His System awakens. He uses battle to sustain his forces and recruits troops and horses. From Yanqi to Anxi, from Anxi to Beiting, and from Beiting to Chang’an, he sweeps aside every enemy!

Tubo’s chief minister, Lun Qinling? He’ll make sure the Tibetan Empire is utterly destroyed!

The Uyghur Khaganate? He’ll bring the trade routes of the Western Regions under his banner!

The Tang emperor? If the Tang dynasty has rotted away, he’ll be the one to bring it to an end!

History should not have turned out this way. The white-haired soldiers of Anxi should not have ended up like this.