The APPSMO Advantage: Strategic Opportunities provides a comprehensive overview of the Asia Pacific Programme for Senior Military Officers (APPSMO), organized by the S. Rajaratnam School of International Studies (RSIS). The program consists of an intensive week-long series of lectures and discussions involving senior military officers from Singapore and other Asia-Pacific countries, allowing them to engage with key policymakers and scholars on pressing defense and military issues. This book commemorates the 20th anniversary of RSIS and the 18th year of APPSMO, emphasizing the program's role in enhancing informal communication and networking among military leaders in the region. By facilitating valuable exchanges between military personnel and the scholarly community, the book highlights the evolving dynamics of defense diplomacy within the Asia-Pacific context.