In recent years, the ambitious Russian military build-up, coupled with revanchist Russian rhetoric and increasingly aggressive behavior, has made it clear that the security environment in the Baltic Sea region has changed. This situation is likely to last for a long time, emphasizing the need for a coherent response and deeper defense cooperation. In “Enhanced Defense Cooperation: New Opportunities for US engagement in the Baltic Sea Region,” the Swedish Embassy’s Defense Adviser Johan Raeder argues that it is in the interests of Finland and Sweden, already strong partners, to contribute to Baltic security by facilitating NATO’s efforts and promoting US engagement and presence. Whether developing NATO’s Readiness Action Plan, planning for Baltic Air Policing, or supporting forces stationed in Europe, enhanced Finnish and Swedish defense cooperation would provide the United States with new opportunities and help develop standards for smart defense.