The Great Xia's Guardian Commander

The youngest marshal in Great Xia, Lin Xuanzhou, has never lost a battle and commands awe across the seas. No one knows that his illustrious military record is all thanks to a mysterious System capable of simulating wars. After crushing the Northern Rong and returning in triumph, he is met not with rewards, but with suspicion from the throne and the court, along with cold shackles. A tiger fallen to the plains, a dragon trapped in shallow waters: the marshal who once guarded the nation is stripped of his command and placed under house arrest in the capital. But they don't know that, for Lin Xuanzhou, the battlefield has never been confined to the borderlands. When he shifts the System's simulations from armies of thousands to the treacherous hearts at court, a silent war to overturn Great Xia is only just beginning.