Qin Mo transmigrates to the Ming Dynasty under the Chongzhen Emperor. The country is beset by internal strife, foreign threats, and natural disasters, and human lives are worth less than weeds. He is only a lowly border soldier, insignificant as a feather.
To survive this chaotic era, and to keep the familiar historical tragedies from happening again, he has no choice but to wield his long blade and keep killing the Tartars and the rebels, along with the treacherous ministers who bring ruin to the country. At last, he kills his way to a peaceful and prosperous age, earning achievements that will shine through history.
If the Qing cavalry is unstoppable, then let them feel the might of modern firearms. If Li Zicheng wins people over with popular support, then make sure everyone has enough to eat and see who still follows him into rebellion. But there are still people at court forming factions for their own gain. Sometimes taking action is simply more effective. Some call me crude, but we soldiers really only know how to speak with our swords and blades.