I Fight the High-Martial World with a Puppet Army

After transmigrating to a dynasty where martial arts reign supreme, he is sent to serve in the army from the start. After escaping, he finds a mountain and activates the System, where he can exchange points for puppet troops of various types: engineers, infantry, archers, cavalry, medics, scouts, and more. He acquires several brave generals and later finds strategists and military advisors. With enemies pressing closer at every turn, he continuously expands his puppet army and uses his strategic and military skills to fight back.