I Signed for an Army of Two Hundred Thousand from the Start

Xu Mubai transmigrates to another world as the only son of the Prince of You's household. The emperor has just died, and the Crown Prince has ascended the throne, but lacks the prestige to control the country. Prince Liang is preparing to rebel, but is held back by the region's sparse population and poor resources. So both sides write to win over Xu Mubai's cheap father.

Fortunately, Xu Mubai awakens a System and summons an army of 200,000, giving Xu An the means to survive in this turbulent age.

Father, don't worry. Let me first see what these two traitors have written.