Arknights Simulation, but From the Start I'm the Emperor of Ursus

No AI, because a weasel spirit was conscripting soldiers. One day, Luo Feng transmigrated to Terra. The good news: a passing System saved his life. The bad news: it wasn't Holy Terra, but it was still Terra, and he'd been dropped in a snowy wasteland, where he was about to freeze to death. Since things had come to this, System, let me see what you're capable of.

Luo Feng had no choice but to activate the simulation system, traveling through the nations of different timelines and experiencing all sorts of events.

He was once the emperor of Ursus. To make his country powerful, he fought the demons and waged wars across the land. For his mother and sister, he drew his sword against his own father. For his ideals, he led his country through the flames of rebirth, changing the twisted nation through his own efforts. In the end, he died by the sword of his most beloved student.

He was once the lord of Kazdel's royal court, transforming Kazdel from the ground up. In the end, he died at the hands of his enemy while protecting others.

He was once the Son of Heaven of Great Yan, ruling over the four seas and bringing glory and prosperity to his country. In the end, for the sake of his dear friend and his country, he chose to perish alongside a colossus.

When the simulation ended, Luo Feng finally thought she could have some peace and quiet. But then they came looking for her.

Wait, weren't those all just simulations?

"Eep, can we make peace?"

They (Talulah, Yelena, Alina, Virtuosa, Nian, Ling, Dusk, and others): "At a time like this? You can't be serious, can you?"