Reborn as the Commander of the US Forces in Korea!

Yan Wang was a special forces soldier. During a mission, an enemy pilot deliberately crashed a fighter jet to take them both down. But Yan Wang discovered that the underworld really did exist. It was just very different from what he had understood about it. He passed through the legendary checkpoints: the Ghost Gate, the Road to the Yellow Springs, the Three Lives Stone, the Tower of Hometown Viewing, the River of Forgetfulness, the Ridge of Evil Dogs, and the Mountain of Golden Roosters, only to find that none of these places seemed to have any guards. He didn't even see the legendary Ten Kings of Hell. By the Bridge of Helplessness, he saw a woman who might have been human or divine. Something seemed wrong with the Meng Po soup he drank. After drinking it and being reincarnated, he discovered that his memories hadn't disappeared at all. What's more, he was reincarnated directly into a time three hundred years later. Over those three hundred years, the world had changed beyond recognition. A blood-red tide had descended, martial arts and supernatural powers had awakened, and even extraterrestrial life and mechs had appeared. After he accidentally discovered a bug in the System and abnormalities in his own body, the secrets of Heaven and Earth were revealed! Since this is a cultivation story, let's start with the commander of the U.S. Forces Korea!