Great Tang: This Imperial Son-in-Law Can Summon Famous Generals from History

This is the Tang dynasty? And I'm the son-in-law of the future empress of the Tang dynasty?

Why is this so different from the Tang dynasty I know? Wasn't it supposed to be the glorious age of the Tang? How have enemy troops reached the capital? The realm is in peril, on the verge of collapse!

And what's with the neighboring Goryeo Empire, Mongol Empire, Ryukyu Empire, Tianzhu Empire, and Russian Empire?

And why can enemy generals summon strange beasts in battle? Is this even the Tang dynasty?

A different Tang dynasty, a different history.

With the nation in peril, I, its royal son-in-law, gain the ability to summon famous generals from history. But these historical generals seem a little different too.

One can slay a giant dragon with a single swing of his Green Dragon Crescent Blade!

One's every spear thrust rings with the roar of a dragon!

One is surrounded by such murderous aura that he seems like a god of slaughter incarnate!

I'm the Tang dynasty's royal son-in-law. If there's no glorious Tang age here, then I'll create one myself!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Please do not imitate them.