Bright Sword: Give Me Eight Hundred Cavalrymen, and I'll Dare to March South and Claim the Throne

[Summoning Historical Armies] [Pure Adrenaline] Qin Yu transmigrates for no apparent reason into the world of Bright Sword, only to hear a voice shout, “Cavalry company, charge!” At the same time, Qin Yu has a System that lets him summon ancient armies. Bows and arrows against guns? Catapults against cannons? Does that make any sense? The System also gives Qin Yu a main quest: [Take control of the Central Plains and march south to claim the throne!] But once Qin Yu starts summoning troops, he discovers that things aren't quite what they seem. One slash breaks a city gate; a spear thrust pierces an armored vehicle; he cuts through ten thousand troops and slays the Japanese invaders' general. What? Modern weapons are stronger? My army is fully equipped with bulletproof armor. What are you going to do about that? What? You have a hundred thousand troops? I've got eight hundred. Fine, eight hundred it is. Eight hundred have their own way of fighting. Eight hundred Tiger Warriors can outmatch a hundred thousand troops and scare them into staying inside the city. From the start, give me eight hundred cavalry, and I'll prove the world wrong!