Traveling Through Another World, Behind Me Is the Entire Empire's Technology

Colonel Schneider and Dr. Victor used the time and space device to travel back to the year before the defeat. They knew that due to the stubbornness and incompetence of the empire's top leaders, they could no longer save the empire. They decided to give up cooperation with the core of the empire this time and use existing black technology to open the door to another world and recreate the glory of the empire there!