South Korea has emerged as a critical defense partner for Europe and the United States over the past five years, its dramatic rise epitomized by massive weapons procurement from European countries like Poland that pushed aside longtime European defense champions, as well as rare bipartisan consensus in the United States for possible Jones Act amendments to facilitate South Korean investments and allow repair of U.S. Navy vessels in South Korea. Can these defense partnerships sustain momentum, or will they prove a temporary marriage of convenience destined to fade as Europe pursues "strategic autonomy" with preferences for intra-EU procurement and the United States implements "Buy American" provisions? What steps should Korea and its allies take to further deepen the partnership?