Military Man! Ryan!

Traveling through a different world, he gained the superpower of being able to form an army by one person - summoning soldiers. Ruian, who possessed this powerful skill, failed to become Long Aotian. After failing in the battle with the feudal forces, he was frustrated and came to a small town on the border and began a peaceful life. But there is still a fire in his heart that will one day burn the entire old world again. This book was originally intended to be titled "About me being reincarnated into a different world and gaining military power, but I just wanted to live in seclusion", but it was longer than 15 words.