With the drawdown of U.S. forces in Germany underway, a reduction of U.S. forces in South Korea is now more likely than ever, given evolving U.S. defense priorities and longstanding trends on the Korean Peninsula. Rumors of an imminent U.S. force drawdown in Korea have been circulating since at least 2019, and President Donald Trump has made it clear he wants to reduce large overseas basing. South Korea, however, is a particularly contentious case, as any changes to the size and structure of U.S. forces must take into consideration both the local mission of deterring against North Korea, as well as the broader U.S. strategic mission of refocusing on great power competition, particularly with China. And that will require reassessing South Korea's own national defense capabilities, the benefits and risks of having a large forward force based on the Asian mainland, and the impact of any shift in forces on...