The Copper Knife Army has always been one of the more infamous private military forces in the tea-colored grounds. They don't belong to any nation but are often seen in national wars.
Whichever country is willing to pay a high price, they sell their services to them; given the chaos of the tea-colored grounds, a strong private army like theirs never has to worry about going hungry.
In the Copper Knife Army, there are more than three thousand soldiers proficient in blade techniques, not to mention a few Divine and Mortal beings among them. The core force leading this army is also a group of Blade Masters with high cultivation bases, experts in assaulting cities and killing enemies. Even the armies of some city-states need to retreat when they encounter the Copper Knife Army!
With their formidable strength and strict discipline, and with many powerful interests entangled behind them, many countries tend to accommodate them.
