Primordial Myriad Races

After a disaster relief mission goes awry with a bizarre mutation, scout Lin Yue wakes up to find himself in the primordial land of warring races. Sorcerers command wind and rain, giant beasts roam the wilderness, and tribes clash in endless slaughter. With no guns or artillery, only an old dagger remains. All his modern military skills are his sole reliance. Unable to return home, he must carve out a place for himself in this savage world! — Description from novelcodex.org