Warlord, Zhang Yuting, Step Aside. I'm the King of the Northeast

[No System + warlords + climbing the tech tree + ruthless decisiveness + utterly satisfying] After transmigrating to a fictional country, he becomes the legitimate son of a Fengtian warlord. He builds an enormous empire in America from the start. When the situation back home changes, Ma Hongsheng rushes back, determined not to miss this turbulent era! At every critical moment, elite troops and capable generals, along with an industrial base, are rapidly built up through battle after battle! In these chaotic times, he measures truth by caliber and defends dignity with range! Decades later, Ma Hongsheng commands a million troops, and a steel tide sweeps across nation after nation. Facing the bloodthirsty foreign powers and the corrupt Tartar rulers, Ma Hongsheng surveys the situation and smiles faintly: “If your family can rule this country, why can’t I?”