In late June 1950, President Harry Truman ordered U.S. forces into combat against the North Korean invasion of South Korea. One of the first units to respond was a combined U.S. Navy–Royal Navy task force with one aircraft carrier from each navy.

The North Atlantic Treaty Organization (NATO) is heralded as the world’s most successful military alliance. However, it finds itself under pressure from within and without. Some people in NATO countries do not understand the importance of its goal: to safeguard its members’ freedom and security by political and military means. This goal is executed through three mission sets: collective defense, crisis management, and cooperative security. Other people outside NATO countries understand those missions well—and seek to destroy the Alliance.

The U.S. military is entering a period of dramatic redirection and restructuring at a time of broader international upheaval, from Ukraine to Syria. The past decade of global conflict has emphasized the predominant hard power focus of the Armed Forces, often with limited success. The emergence of a new mission—smart power—offers opportunities to shift toward innovative forms of international intervention and conflict resolution by the U.S. military through coordination with national security strategies such as global health diplomacy (GHD)