Your Majesty, This Battle Really Cannot Be Fought Like This.

The protagonist is a modern military staff officer who traveled through time to become a subjugated general who had just lost a war and was captured by the enemy emperor. Just when he was about to die generously, he discovered that the emperor was a military idiot, but he liked to lead military campaigns in person, and he was very lucky and could always win the war inexplicably. The protagonist was left as a "military advisor", and his daily job was to persuade the emperor: "Your Majesty, you can't send cavalry to attack the archery array!" "Your Majesty, you have to dig trenches when setting up camp!" The emperor listened every time, but only half-listened to each time. Then, relying on amazing luck and the protagonist's ability to wipe the butt, he actually unified the world. Finally, the emperor wanted to personally attack the most powerful neighboring country. The protagonist looked at the plan full of loopholes on the map and fell into deep thought: Can we still rely on luck this time?