What is the most effective stratego board game strategy to outmaneuver your opponent and secure victory?

One effective Stratego strategy is to focus on protecting your flag while also trying to uncover your opponent's flag. Use your higher-ranking pieces to attack and capture your opponent's lower-ranking pieces, while keeping your own high-ranking pieces well defended. Pay attention to your opponent's moves and try to anticipate their strategy to outmaneuver them and secure victory.