Neptune? No, the System Forced Me to Be the Emperor of the Sea!

Li Ling transmigrated to 1898, commanding an 180,000-strong ragtag army, only to be treated like fish on a chopping board by foreign powers and Japan—until he was bound to a system from the interstellar era. From then on, the story took a dramatic turn: the protagonist sold arms during the day, instigating a global battleship race, and at night, he built dreadnoughts, aircraft carriers, and super battleships. Gradually, laughing and joking, he fought his way to becoming the sole superpower.