Well, as we know, prior to 1945, Japan was the top military power in Asia, and could defeat South Korea easily, as it did in 1910 and almost as it did in 1592-1598 (though they just took parts of the country, and withdrew with the death of Hideyoshi and because of gueirilla resistance). But today, without any American or foreign intervention, can South Korea military defeat Japan's Jietai?