In an ancient time and space similar to the late Qing Dynasty, the great powers relied on advanced firearms to compete with armored ships, and the country's coastal defense was riddled with holes. Protagonist 1 is a modern person who has traveled through time, and his soul is possessed by a young man from a military family. Protagonist 2 is a close friend of the young man, who also cares about the fate of the country. Although the protagonist 1 has modern knowledge, he has just arrived in this strange ancient times and faces difficulties such as backward military technology and lack of resources. Due to his low status, it is difficult to obtain support from the upper levels. At this time, the great powers are pressing forward step by step, leaving little time for the country. On the one hand, the protagonist 1 must use modern military concepts and ancestral military manuals to improve the strength of the army in a short period of time. On the other hand, he must adhere to the "character" of his ancestors and not be swayed by the idea of quick success. In the process, he encountered many setbacks, such as difficulty in implementing technology and shortage of resources. The protagonist 2 is there to help and deal with it together. They not only have to face the obstacles of internal decadent forces, but also have to resist the attacks of foreign powers. In the end, Protagonist 1 successfully integrated his forces and used unique tactics to resist the great powers. However, behind the victory were the sacrifices of countless soldiers and civilians. Protagonist 1 continued to plan for the future of the country in bitterness. [Story Introduction-End]