Thailand, a long-standing defence partner of the United States and ASEAN’s second largest economy, occupies a geostrategically important position as a land bridge between China and maritime Southeast Asia. This book, based on extensive original research, explores the current state of US-Thai relations, paying particular attention to how the United States is perceived by a wide range of people in the Thai defence establishment and highlighting the importance of historical memory. The book outlines how the US-Thai relationship has been complicated and at times turbulent, discusses how Thailand is deeply embedded in multi-faceted relationships with many Asian states, not just China, and examines how far the United States is blind to the complexities of Asian international relations by focusing too much on China. The book concludes by assessing how US-Thai relations are likely to develop going forward. Additionally, the work contributes to alliance theory by showing how domestic politics shapes memory, which in turn affects perceptions of other states.