Three Kingdoms: I Started Growing Stronger by Standing Beside Great Generals

Liu Cheng transmigrates, and the bad news is that he's become an ordinary soldier. The good news is that staying by the side of famous generals from history boosts his stats. Starting as a foot soldier, he recruits renowned generals and claims territory. He works hard to develop the economy, then looks up one day and realizes: Good heavens, in the eyes of the common people, he's become a towering tree.