Shock! He Became a Soldier as Soon as He Joined the Army

[System][King of Soldiers][Upgrade] The protagonist, Matthew Yun, awakens the King of Soldiers system by chance during a training, and a rookie recruit transforms into a super King of Soldiers who is feared by all countries. "Those who despised me in the past were eventually trampled under my feet one by one." Don't ask if it's open or not, just ask and you'll be invincible! ! ! The introduction is weak, so please move on and watch.